Kaolin and Jasmonic acid improved cotton productivity under water stress conditions

Abstract

Drought is one of the most emerging threat that causes a severe reduction in cotton plant growth and development. Being cotton is a major cash crop has great threat to prevailing drought events in Pakistan. A field experiment was conducted in Kharif season 2018 at Research Area of MNS-University of Agriculture, Multan, Pakistan to assess the role of foliar applied kaolin and jasmonic acid on vegetative growth, gas exchange and reproductive traits of cotton under normal irrigated and artificial water deficit conditions. The experiment was laid -out in a factorial randomized complete block design with split – split plot arrangement. Main plots were allocated for irrigation levels, sub-plots for two -cotton genotypes viz. NIAB − 878 and SLH − 19 while sub – sub plots for treatments of kaolin and Jasmonic acid. Water deficit stress was created by skipping irrigation at flowering for 21 days. Foliar sprays of Kaolin (5%, w/v) and Jasmonic acid (100 μM) were applied alone or in combination at 60 days after planntinon both to normal irrigated and water-stresse skip irrigation while irrigation water alone was sprayed in control plots. Both cotton genotypes responded variably to normal irrigated and skip conditions. Skipping irrigation for up to 21 days at flowering caused a significant decrease in leaf relative water content, SPAD values, net photosynthetic rate and seed cotton yield in both the genotypes. Seed cotton yield showed an overall decline of 24.7% in skip over Normal irrigated crop. The genotype NIAB − 878 produced maximum seed cotton yield of 3.304 Mg ha −1 in normal that dropped to 2.579 Mg ha −1 in skip, thus showing an average decline of 21.9 %. Similarly, SLH − 19 produced 2.537 Mg ha −1 seed cotton under normal that dropped to 1.822 Mg ha −1 in skip, showing an average decline of 28.2%. The Application of Kaolin and JA Jasmonic acid, either applied individually or in combination, improved vegetative and reproductive development of both cotton varieties in normal and skip regimes. However, combined kaolin and Jasmonic Acid application proved to be more beneficial in terms of seed cotton production and other parameters studied.

Diversity and correlation analysis of endophytes and metabolites of Panax quinquefolius L. in various tissues

“…Dihydromyricetin exhibited anti-inflammatory, paroxysmal, hypotensive, and hypolipidemic effects [ 38 ]. Jasmonic acid is present at a high content in leaves and is often used as an endogenous growth regulator in higher plants [ 39 ]. Exploring the differences in metabolites in different plant tissues helps to identify the biochemical activities occurring in these tissues, which can promote the comprehensive utilization of P. quinquefolius .…”

Asparagine and nitric oxide jointly enhance antioxidant capacity and nitrogen metabolism to improve drought resistance in cotton: Evidence from long‐term field trials

“…Seed cotton yield is a crucial indicator of crop productivity and is often used to compare different varieties or growing conditions (Mudassir et al, 2021). Drought stress causes stunted growth, reduced leaf area, and smaller stems in plants, leading to reduced boll numbers and seeds produced (Nazim et al, 2021). The study results show a reduction in both plant growth and seed cotton yield in drought stress conditions.…”

Harnessing Phytohormones: Advancing Plant Growth and Defence Strategies for Sustainable Agriculture

“…These phytohormones intricately regulate a spectrum of physiological and biochemical processes that positively impact growth (Rivas‐San Vicente and Plasencia, 2011). Notably, they modulate chlorophyll fluorescence and seed germination dynamics (Sheteiwy et al, 2021), augment activities related to photosynthesis (Rivas‐San Vicente and Plasencia, 2011; Nazim et al, 2021) and stimulate the growth in both vegetative and reproductive plant organs (Ghorbel et al, 2021). Recent investigations by Hewedy et al (2023) further substantiate the affirmative influence of JA on plant growth.…”