The results revealed that highest leaf length (6.70 cm) occurred in plants getting spray of liquid MS medium once in a week along with BA @ 50 ppm at one month interval (Fig 2). On an average leaf length (5.74 cm) was obtained in the treatment N:P:K (12:61:40) @ 0.2% sprayed once in a week (Table 1) followed by leaf length (5.71 cm) in plants of getting macro and micro nutrient mixture sprayed once in a week and leaf length (5.70 cm) in plants got spray of liquid MS medium once in a week which were found at par with the highest. Among different nutrient solutions, liquid MS medium spray exhibited longest leaf (5.30 cm) (Fig 3a). Among different growth regulators, BA @ 50 ppm spray at monthly interval resulted highest average leaf length (5.29 cm) (Fig 3b). In between nutrient composition and growth regulator interaction N1G1 (spraying of liquid MS medium along with GA3 @ 100 ppm at monthly interval) showed highest leaf length (6.02 cm). The higher leaf length might be result of presence of ample N,P,K and micro nutrients in the liquid MS medium. Similar findings also found by
Kaushal, 2018. Nitrogen contributing to vegetative growth, might be attributed better leaf length. Evidences proved maximum plant spread by BA (
Mondal and Sarkar, 2018) which can be indication of presence of longer leaves.
The recorded data showed that spraying of liquid MS medium once in a week along with GA
3@ 200 ppm at bimonthly interval exhibited widest leaf breadth of 2.67 cm, similar results were also seen in F
2N
2G
1 (spraying of macro and micro nutrient mixture twice a week along with application GA
3 @ 100 ppm at 2 month interval) (Fig 2). On an average highest leaf breadth (1.93 cm) was obtained in the treatment in F
1N
1 (spraying of liquid MS medium once in a week) and F
2N
3 [spraying of N:P:K ( 19:19:19) @ 0.2% twice in a week] with spraying of micro nutrient mixture at fortnightly interval] between various interaction of nutrient solutions with their frequency of spraying (Table 1). Among different growth regulators, GA
3 @ 100 ppm at monthly interval resulted highest average leaf breadth (2.05 cm) (Fig 3b) which is found similar to result observed by
Bordoloi and Talukdar (2019). In between nutrient composition and growth regulator interaction, N
2G
1 (spraying of macro and micro nutrient mixture along with GA3 @ 200 ppm at monthly interval) showed widest leaf (2.63 cm). The restorative activities of Gibberellic acid in mounting up cell division and hence impacting cell expansion can be a more possible cause for higher leaf breadth observed in anthuriums plants treated with different concentration of GA
3. The presence of micronutrients may attribute to highest leaf breadth as observed by
Kaushal (2018).
It was observed that maximum leaf area (12.42 cm
2) occurred in F
1N
1G
2 treatment combination (spraying of liquid MS medium once in a week along with GA
3 @ 200 ppm at bimonthly interval) (Fig 2). On an average highest leaf area (8.20 cm
2) was obtained in the treatment in F1N1 (spraying of liquid MS medium once in a week) among various interaction between nutrient solutions with their frequency of spraying. Among different nutrient solution, nutrient solution N1 (spraying of liquid MS medium) exhibited largest leaf (7.13 cm
2) (Fig 3a). Among different growth regulators, GA
3 @ 100 ppm at monthly interval resulted highest average leaf area (7.91 cm
2) (Fig 3b). In between nutrient composition and growth regulator interaction N
1G
1 (spraying of liquid MS medium along with GA
3 @ 100 ppm at monthly interval) showed largest leaf area (10.69 cm
2). This might be attributed by nitrogen presence in MS medium along with interaction of micronutrient present in MS medium as according
Kaushal (2018), MS micro medium along with N,P,K solution resulted highest leaf breadth which eventually indicates the leaf area of plant. On an average highest leaf area was observed in GA
3 @ 100 ppm and similar results was noticed by
Bordoloi and Talukdar (2019).
Rathod et al., (2021) also observed maximum leaf area in strawberries with application of 100 ppm of GA
3.
The outcomes of investigation sported that maximum leaf chlorophyll content (1.05 mg/g) occurred in F
1N
1G
6 treatment combination (spraying of liquid MS medium once in a week along with humic acid @ 0.2% at monthly interval) (Fig 2). On an average highest leaf chlorophyll content (0.87 mg/g) was obtained in the treatment in F
1N
1 (spraying of liquid MS medium once in a week) among various interaction between nutrient solutions with their frequency of spraying (Table 1). Exogeneous fertilizer applications were found to increase in total chlorophyll content (
Duc and Hoang, 2023). The presence of nitrogen in different form along with magnesium sulphate in M liquid medium might supplemented to leaf chlorophyll content as they are the integral part of both chlorophyll a and b. Both increased level of nitrogen and magnesium positively impacts leaf chlorophyll content (
Hermans and Verbruggen, 2005;
Wang et al., 2021; Adebayo, 2021). Among different growth regulators, GA
3 @ 200 ppm at monthly interval resulted highest leaf chlorophyll content (Fig 3b). Similar findings were obtained by
Shanan et al., (2014) in Celosia.
Aparna (2012) found that with application of higher dose of GA
3, higher chlorophyll content was found.