Influence of Chitosan Foliar Application on Quality and Biochemical Traits of Strawberry (Fragaria × ananassa Duch.) under Naturally Ventilated Polyhouse

Elicitors Mediated Response of Growth, Yield and Quality of Kalmegh (<em>Andrographis paniculata</em> Wall. ex Nees)

“…While, greater number of days were needed for the first flower bud to appear on water-sprayed plants because of hormonal imbalance that promote vegetative growth only instead of flowering. These outcomes are consistent with those of Farouk and Amany (2012), Salachna and Zawadzinska (2014), Mutka et al (2017), Dhakad (2019) and Nithin (2020). The highest chlorophyll concentration was found in the plants sprayed with salicylic acid and chitosan, which led to greater generation of photosynthates and their accumulation.…”

“…Correlation analysis among different traits in elicitor treatments (Table 12) revealed that fresh herbage yield of plant having highly significant positive association with plant's height (0.80), spread (0.95), primary (0.91) and secondary branches (0.87), leaves number (0.88), leaf area (0.87), leaf area index (0.87), dry herb yield(0.99) and dry matter content (0.97) and positive significant association with total chlorophyll (0.81) and total andrographolide contents (0.82). Similar positive association was reported by Jadhav and Bhamburdekar (2012), Sayyari et Nithin (2020).Total andrographolides content in kalmegh plant in elicitor treatments showed positive and significant association with plant's leaves number (0.72), leaf area (0.69) and leaf area index (0.69). Positive and highly significant association was found with plant's fresh (0.82) and dry herb yields (0.82), dry matter content (0.82) and total chlorophyll content (0.98).…”

“…This can be explained by the fact that the taller plants could bear more number of branching nodes and were able to show a high plant spread. Increased availability and uptake of water and vital nutrients through adjusting cell osmotic pressure and reducing the accumulation of harmful free radicals by increasing antioxidant and enzyme activities are likely the causes of chitosan's stimulatory effect on plant growth (Nithin, 2020). Additionally, it might be credited to improved nitrogen transfer to functional leaves, greater photosynthesis, and increased enzymatic nitrogen metabolism activities (nitrate reductase, glutamine synthetase, and protease), all of which facilitated plant growth and development (Mondal et al, 2012).…”

“…(Gharib, 2007, Sayyariet al, 2013, Mohsen et al, 2014, Karimian et al, 2015, Pradhan et al, 2016, Koppad et al, 2017and Sathiyamurthyet al, 2017. Besides, foliar spray of SA and chitosan helped to activate the signalling pathways of growth regulating substances like gibberellins and auxins which might also contributed to increased bio mass of plants by increasing number and size of cells (Supriya, 2015, Gorni and Pacheco, 2016, Youssef et al, 2017, Vitthal, 2018, Forouzandeh et al, 2019and Nithin, 2020. The stimulation of physiological processes, improved vegetative growth, active translocation of photoassimilates from source to sink tissues, increased number of leaves and branches per plant, and accumulation of dry matter may all be contributing factors to the increase in yield per plant in the treatment receiving chitosan spray.…”

Bacillus amyloliquefaciens as a halo-PGPB and chitosan effects in nutritional value and yield production of Asparagus officinalis L. under Sonora desert conditions

“…Our results where the QUI favored the rate of emergence of plants as well as those previously indicated by different authors are evidence that the presence of chitosan plays a role in growth and development at different vegetative stages, such as emergency, of diverse plants (Bagwell et al, 2001). Nithin et al (2020) revealed that cultivation of strawberry variety "winter dawn" by application of chitosan found better for increasing vegetative growth, yield attributing traits and yield under naturally ventilated polygreenhouse.…”