Strawberry the
Rosaceae family’s fruit is one of the most attractive soft fruit of the world. It is an aggregate fruit ‘achenes’ and its edible part is fleshy thalamus. Runners used to propagate but nowadays tissue culture is also adopted. Optimum moisture and temperature conditions in upper layer of soil are essential for strawberry plant because these conditions affect growth and yield performance of the crop. Because the roots are shallow in nature, plants require regular watering in less quantity
(Vishal et al., 2016). The plant thrives in all climates, whether they are typically temperate, subtropical plains, or even high-altitude tropical regions
(Pramanick et al., 2019).
Strawberry is covering 1000 ha total area with production of 8000 MT in India (NHB, 2019-20). Here, Maharashtra is leading state in production of this fruits. It is grown in Uttarakhand, Uttar Pradesh, Himachal Pradesh, Madhya Pradesh, Maharashtra, Karnataka, Punjab and Haryana in India. This fruit is a good source of vitamin A (60 IU/100 g of edible portion)
(Panigrahi et al., 2019), vitamin C (58.8 mg/100 g), carbohydrates (8.4 g), fats (0.5 g), protein (0.07 g)
(Tariq et al., 2018;
Hossain et al., (2016), minerals like potassium (164 mg), calcium (21 mg) and phosphorus (21mg) and other dietary. Strawberry has a delightful flavor and taste and is a great source of potassium, secondary metabolites, sugar and fibre
(Farid et al., 2020). It contains relatively high amount of ellagic acid, quercetin, fisetin and ellagitannins
(Giampieri et al., 2015). Additionally, strawberry fruit has been shown to be helpful in reducing inflammation, obesity- related problems, and the risk of developing a number of malignancies and heart ailments
(Afrin et al., 2016). Strawberry fruit have great demand in fresh market or in the form of preserve as well as in processing industries. Strawberry is heavy feeder which requires micro and macronutrient for more production. For a better yield of high quality fruits, strawberries need more nutrients. Increasing growth, flowering, fruit yield and quality of strawberry plant by the use of micronutrients like copper sulphate, zinc sulphate
etc. Deficiency of these micronutrients causes chlorosis in strawberry by Zn and stunted growth habit by deficiency of
(Cu Zewail et al., 2020). The Zn treatment has a positive impact on several biological mechanisms by enhancing nutrient uptake and stabilizing phytohormone, antioxidant, and amino acid levels in plant parts
(Leite et al., 2020). Zinc plays a significant role in many different enzymes, whether as metal elements in the catalysts themselves, or as a functional or controlling element
(Bairwa et al., 2022). During vegetative growth of strawberry, spray of Ca helps to delay ripening and mold development. It also helps in maintaining fruit persistency, enhancing vitamin C content, physiological disorder of apple. An increase in apoplastic Ca concentration is typically caused by calcium administration, which may change the structure and function of cell walls, membranes and fruit ripening
(Kazemi et al., 2015). Major elements including nitrogen, potassium and phosphorus are crucial for strawberry growth, development and production. It is impossible to dispute the significance of secondary elements like iron, boron, zinc, copper,
etc. because they acted as a catalyst to keep the growth and production going
(Sabahat et al., 2021). Micronutrient foliar feeding has a significant impact on strawberry characteristics relating to plant growth, yield, factors influencing yield, and qualities. Foliar feeding of micronutrients boosts the usage efficiency of micronutrients by trying to minimize nutrient losses
(Sangeeta et al., 2019). With the use of Zn and Fe, improvement in production and quality has been noted in a number of fruit crops
(Shanker et al., 2019). Beside these nutrients, environment factor also impact the growth and development
(Patil and Chetan, 2018).
Health benefits of strawberry fruits
Any form of strawberry consumption is linked with better lipid profiles, micro vascular function and platelet reactivity, among other indicators of cardiovascular health. Increased consumption of polyphenols has been linked to lowered CVD risk and decreased platelet reactivity. In addition to being a good source of dietary nitrate, strawberries are loaded in polyphenolic components such anthocyanin, flavanols, ellagic acid (EA) and ellagitannins (ET) are known to have beneficial effect on vascular system. Dietary nitrate can improve vascular health by converting to nitrite and nitric oxide, which can then cause ischemia and prevent platelet aggregation
(Holt et al., 2020). The primary strawberry phytochemical bioavailability and metabolism, as well as how they work to fight a variety of diseases developed in human body
(Afrin et al., 2016). Strawberry fermented beverages may have antioxidant, antibacterial and anti-bio film formation properties. This suggests that they may be good natural candidates for antioxidants, antibacterial and anti-bio film agents
(Zhao et al., 2021).
Presence of secondary metabolites
Phenolic compounds, the most prevalent class of secondary metabolites, are found in strawberry fruits and have at least one aromatic organic ring in their chemical compositions. Coumarins, flavanoids, phenolic acid and tannin are comes under Phenolic compound
(Delgado et al., 2019). Pelarogonidin 3-glucoside is major anthocyanin which has anti-inflammatory effect
(Amini et al., 2017). Flavonoids including anthocyanins are secondary metabolites in which flavonoids protect plant from UV radiation while anthocyanins guard plant from blue and green light
(Landi et al., 2021; Agati et al., 2020). The two main flavonols found in farmed strawberries are one is quercetin and is other kaempferol
(Labadie et al., 2020). Regarding the dietary effects of flavanols, they may enhance nitric oxide availability and vascular function as well as control metabolism and respiration
(Al-Dashti et al., 2018).
Benefits of strawberry on corona virus (COVID-19) pandemic
The immune system is significantly modulated by the vitamins and minerals found in diets high in fruits and vegetables, particularly the vitamins A, C, D, E, and B complex as well as zinc and selenium
(De Faria Coelho-Ravagnani et al., 2021). Berries are one of those foods that have anti-inflammatory and antioxidant properties that help to maintain a robust immune system and lower the risk of corona virus infection. The immune system is improved by strawberries because they include antioxidants like vitamin C and bioactive chemicals found in plants. It is used to cure the flu and a cold. By defending cells, strawberries have the capacity to combat free radicals in the body
(Batta, 2020).
Biochemistry of fruit ripening
Additionally, sucrose has been cited as a crucial indicator of strawberry fruit ripeness. It has been demonstrated that a variety of fruit transcriptional regulators control the ripening of strawberry fruit
(Hossain et al., 2018). In strawberry, the flavonoid chain genes FaPAL, FaCHS, FaCHI and FaDFR appeared to be universally regulated by FaMYB1, 5 and 10. The FaSUT1 sucrose transporter gene plays a key role in the buildup of sucrose throughout fruit development
(Zhao et al., 2017). They interact with other proteins like FabHLH to improve the manufacture of anthocyanin and to accelerate fruit ripening
(Xu et al., 2017). A strawberry transcription element TCP family’s role in strawberry fruit ripening was confirmed and FvTCP9 was discovered and isolated. Notably, strawberry fruit ripening was either hindered by temporary RNAi or accelerated by over-expression of FvTCP9. According to transcript analysis, ABA and anthocyanin are crucial components of this physiological process
(Xie et al., 2020).
Propagation of strawberry
Now a day, strawberry is propagated with runners or with in vitro micro propagation in tissue culture. Among the different combinations of growth regulators for
in vitro propagation of strawberry, nodal segments cultured on MS media supplemented with BA+ NAA+ adenine sulphate took less time for sprouting (92.59%) and also produced maximum shoot length due to the explants physiological state, genetic makeup and adequate auxin and cytokinin levels
(Jhajhra et al., 2018). The paper concluded the effect of temperature, GA3 and BA concentrations and photoperiod on strawberry runner induction and discovered that photoperiod length had greatest impact on runner induction with 16 hours photoperiod, 25/15
oC day and night temperature and 50 mg/L BA. Protein involved with photosynthesis and carbohydrate metabolism was generating for runner induction
(Li et al., 2020).
Flower bud initiation in strawberry
In order to trigger floral initiation, innovative forcing approach required depriving nursery plants of nitrogen. To encourage an early floral start, the following artificially low temperature practices have been developed: short days with solar irradiance and low temperatures in cooling infrastructure; constant dark-low temperatures with refrigeration facilities, including industrial warehouses and intermittent low temperature storage
(Yoshida et al., 2020). In this work, the stamen and axillary bud initiation deficits of the
F. vesca ethyl methanesulfonate (EMS) induced loss of axillary meristems (
lam) mutant. LAM is necessary for the beginning of axillary buds, which is necessary for the development of runners and branch crowns. The strawberry axillary bud initiation process has been shown to be regulated by the functionally characterized gene LAM. GA is more important for axillary buds destiny transition than for bud initiation
(Feng et al., 2021). In the short-day variety “Benihoppe”, over expression of FaHAN deferred blooming and encouraged the development of runners during reproductive growth
(Liang et al., 2022).
Effect of controlled environment on strawberry growth
Strawberries are frequently grown in controlled environments with regulated lighting and temperature because the influence of open environment on strawberry
(Samtani et al., 2019). Strawberry fruit output and quality are significantly influenced by artificial light’s wavelength and intensity and compared to other light sources, blue light alone increases strawberry (
F. ananassa cv. Elsanta) fruit yield by around 25%
(Nadalini et al., 2017). In “Elan” but not in “Yotsuboshi” flower bud initiation after transplanting may be sped up by extending the photoperiod. In order to produce high-quality transplants, strawberry plugs might be grown under artificial illumination with a tailored photoperiod, albeit the success of this strategy seems to depend on the cultivar
(Tsuruyama et al., 2018).
Plastic mulch effect on strawberry plant
Different color polythene mulches and spacing are important in strawberry production because they conserve moisture, manage weeds, regulate hydrothermal cycles and protect the delicate strawberries from direct soil contact
(Das et al., 2022). Several types of mulches most importantly black polythene assisted in modifying the hydrothermal favorable soil conditions and soil management growing conditions for plants
(Ngente et al., 2021). Black plastic mulch has warming properties and is primarily used for winter season strawberries growing in Florida. However, growers stretch planting dates to boost earliness, black plastic mulch might exacerbate heat stress during establishment
(Daschamps et al., (2019). In comparison to other coloured mulches, red and black color plastic mulches yielded more strawberries. The type of mulch had no impact on the vegetative growth of plants or the quality of the berries
(Lalk et al., 2020). Plastic mulch and low tunnel strawberry plant production gradually improved strawberry cv. festival’s vegetative growth characteristics, fruit yield and its components and fruit quality parameter
(Soliman et al., 2015).
Role of strawberry in income generation
The goal of doubling farmer’s income by minimizing their after-harvest losses and enhancing the demand of perishable cultivable fruit crops is achieved. Because it is a seasonal fruit and is nutrient-dense, it may be consumed outside of the growing season. It can also give rural farm women work and help farmers quadruple their income
(Mehta et al., 2019). Resource usage efficiency looks into each input’s effectiveness and shows if it is being used too much or too little
(Qamar et al., 2017). Since the goal of every productive farm is to maximizing profit by reducing expense, it is crucial to assess the level of efficiency of the farmers when it comes to input utilization
(Khatun et al., (2019).
Packaging material for strawberry storage
Freshly picked fruits is packed in plastic punnets and wrapped in a variety of packaging materials, including cellophane paper, cling film, low-density polyethylene 25, 50 and 75m and polypropylene 25m. Modified atmospheric packaging using different films may be shown to be one of the best and most economical ways to have a longer lifespan with proper quality for a soft fruit like strawberries
(Panda et al., 2016). MSN (mesoporous silica nanoparticle) prepared films had a positive effect on fruit weight reduction and antioxidant activity, but they didn’t seem to differ much in texture, pH, or citric and ascorbic acid levels from unwrapped samples. Based on these findings, PEC (pectin) based films made with MSN (mesoporous silica nanoparticle) and glycerol can be recommended as suitable options for increasing the life span of various fruits
(AI-Asmar et al., 2019).
Influence on physiological disorder of strawberry
The 5.5/7.0 ratio of K
+/Ca
2+ ratios remarkably accelerated or lowest the tip burn physiological disorder of Albion cultivar of strawberries in soilless and high amount of k can limit the availability of Ca and Mg and cause growing leaves and flowers to burn at the tips
(Adak et al., 2019). With excess application of nitrogen in the soil, low pH causes malformed fruits which are distorted and resemble a cat’s face while fruits with albinism which are swollen and have white or pink spots on their surface and lower the yield by 20-25%. This disorder can be corrected with proper spacing and spray of borax and GA3 during Feb and Nov
(Chaudhary et al., 2022). Trichoderma like bio agents have many advantages, including the prevention and treatment of diseases as well as enhance the yield, improved nutrient absorption and improved crop quality
(Marra et al., 2019). It is possible to suggest applying calcium and boron together to lower the prevalence of albinism, fruit deformity and grey mould in strawberries as well as to increase yield
(Kumar et al., 2022).
Coating maintains strawberries quality during storage
Prior to storage, strawberries coated with chitosan (0.5%) may help to maintain the fruit’s characteristics and strawberries coated with chitosan (0.1%) retain their biochemical characteristics. Chitosan fruit coating improved acceptance of strawberries by consumers under extended cold storage and a 0.5% chitosan coating, strawberry sweetness was preserved
(Hassan et al., 2020). Because edible coating allows for less water vapour transfer, aloe vera gel (AV gel) addition can substantially reduce fungal decay, extending strawberries’ life span up to 15 days of storage at the highest AV gel concentration (20%) while maintaining their physical and chemical properties, such as colour and hardness. Compound films produced from banana starch, chitosan and AV gel serves as examples
(Pinzon et al., 2020). Strawberries’ shelf life would be increased by
Prosopis juliflora leaf Ethanolic extract coating (water soluble) while maintaining their storage quality standards and act against spoiling agents including
B. cinerea (Saleh et al., 2022). The edible coating of calcium chloride and sodium alginate worked well to slow the rise of pH and soluble solid content while reducing metabolism and transpiration rates. Additionally, the coating stopped the growth of surface mould for up to 15 days and preserved the cut fruits’ sensory attributes, such as colour and texture
(Alharaty et al., 2020).
Micronutrient effect on strawberry
Effect of micronutrient on growth, flowering
The growth parameter of strawberry cv. Winter Dawn at 60 DAP showed notable increase by different micronutrient application at all growth stages
(Saha et al., 2019). Combined treatment spray of FeSo
4 and ZnSo
4 increases vegetative growth in strawberry cv. Chandler due to chlorophyll synthesis and electron transfer in oxidation
(Singh et al., 2015). Effect of micronutrients with treatment ZnSO
4 + H
3BO
4 + FeSO
4 @ 0.4% shows minimum days after transplanting to first flower (64.30 days) and no. of flower per plant also increased in strawberry cv. Chandler
(Verma et al., 2018). Earliest flowering, maximum no. of flower/plant increased with the application of GA3 75 ppm+ ZnSO
4 0.4%+ Boric acid 0.4% in cv. Chandler
(Bairwa et al., 2022).
Effect of micronutrient on fruit quality, yield
Before harvesting, the application of micronutrients like zinc sulphate, Boron and iron sulphate helps in enhancing the quality of strawberry fruits. Foliar application of Zn, Fe and B treatment at three time interval
i.e. 30 DAT, 60 DAT and 90 DAT increases quality characters of strawberry fruit
(Sudha et al., 2018). TSS: acid ratio, total sugar and reducing sugar, ascorbic acid and anthocyanin content increased with the application of ZnSO
4 and minimum acidity is recorded with this treatment
(Saha et al., 2019). Average fruit weight of strawberry is improved by the foliar application of Zn
Parmar et al. (2021). Combination of micronutrients like ZnSO
4 + H3BO
4 + FeSO
4@ 0.4% increase fruit per plant. This may be done by increase leaves chlorophyll content, translocation of metabolites, photosynthetic efficiency
(Verma et al., 2018). Strawberry plant treated with RDF + ZnSO4 @ 0.6% significantly increase the yield 1.17kg/plant. This treatment significantly influenced yield and yield attributes parameters of strawberry
(Chandrakar et al., 2019). Improvement of yield characters might be a result of the additional positive effects of Fe on yield. It is possible that plants getting Zn + Fe created more photo synthates and translocated to the growing fruits
(Parmar et al., 2021). 0.4% Zn foliar spray performs best in term of growth and yield in strawberry plants
(Mishra et al., 2016). Growth and yield of strawberry is increased with the application of ZnSO
4 150 mg/l
(Kazemi et al., 2015). Growth regulators and micronutrient have a great potential which influence the vegetative growth and yield of strawberry
(Yadav et al., 2017). 99 mg/l Zn application enhanced growth, yield in strawberry cultivation and increase Zn concentration in fruits
(Bhatti et al., 2021). Boron deficiency worsens fruit quality by raising titratable acidity, but its application enhances fruit quality
(Haider et al., 2019).
Macronutrient effect on growth, yield and flowering
Early blooming, vegetative growth and other reproductive, vegetative and qualitative characteristics of the strawberry plant were all significantly influenced by potassium
(Ijaz et al., 2016). All growth characters like maximum plant height with 120% dose of P per plant and maximum plant spread, number of leaves per plant and minimum no. of days taken to first initiation of flower observed with RDP 100%, but with increased P rates (120%), these growth characters decreased
(Reddy et al., 2021). The continual application of water soluble phosphatic fertilizer together with the prescribed doses of nitrogen and potassium may have contributed to these findings by enhancing nutritional absorption in strawberry fruits
(Ahmad et al., 2018; Singh et al., 2019).