College of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, China.
College of Chemistry and Materials Engineering, Anhui Science and Technology University, Fengyang, 233100, China.
BMC Plant Biol. 2023 Oct 9;23(1):476. doi: 10.1186/s12870-023-04486-3.
Salinity stress is one of the major hurdles in agriculture which adversely affects crop production. It can cause osmotic imbalance, ion toxicity that disrupts essential nutrient balance, impaired nutrient uptake, stunted growth, increased oxidative stress, altered metabolism, and diminished crop yield and quality. However, foliar application of osmoprotectant is becoming popular to resolve this issue in crops. These osmoprotectants regulate the cellular osmotic balance and protect plants from the detrimental effects of high salt concentrations. Furthermore, the role of arbuscular mycorrhizae (AMF) is also established in this regard. These AMF effectively reduce the salinity negative effects by improving the essential nutrient balance via the promotion of root growth. That's why keeping in mind the effectiveness of osmoprotectants current study was conducted on cotton. Total of six levels of γ-Aminobutyric acid (GABA = 0 mM, 0. 5 mM, and 1 mM) and ectoine (ECT = 0 mM, 0.25 mM, and 0.5 mM) were applied as treatments in 3 replications. Results showed that 0.5 mM γ-Aminobutyric acid and ectoine performed significantly best for the improvement in cotton growth attributes. It also caused significant enhancement in K and Ca contents of the leaf, stem, bur, and seeds compared to the control. Furthermore, 0.5 mM γ-Aminobutyric acid and ectoine also caused a significant decline in Cl and Na contents of leaf, stem, bur, and seeds of cotton compared to control under salinity stress. A significant enhancement in chlorophyll contents, gas exchange attributes, and decline in electrolyte leakage validated the effectiveness of 0.5 mM γ-Aminobutyric acid and ectoine over control. In conclusion, 0.5 mM γ-Aminobutyric acid and ectoine have the potential to mitigate the salinity stress in cotton.
盐胁迫是农业中的主要障碍之一，它会对作物生产造成不利影响。它会导致渗透失衡、离子毒性破坏必需养分平衡、养分吸收受损、生长受阻、氧化应激增加、代谢改变以及降低作物产量和品质。然而，叶面喷施渗透调节剂已成为解决作物盐胁迫问题的一种流行方法。这些渗透调节剂可以调节细胞渗透平衡，保护植物免受高盐浓度的有害影响。此外，丛枝菌根真菌（AMF）的作用也在这方面得到了证实。这些 AMF 通过促进根系生长，有效改善必需养分平衡，从而减轻盐胁迫的负面影响。考虑到渗透调节剂的有效性，本研究以棉花为对象进行了研究。共设置了 6 个γ-氨基丁酸（GABA=0 mM、0.5 mM 和 1 mM）和章鱼胺（ECT=0 mM、0.25 mM 和 0.5 mM）处理水平，每个处理重复 3 次。结果表明，0.5 mM GABA 和章鱼胺在改善棉花生长特性方面表现最佳。与对照相比，它还显著提高了叶片、茎、铃和种子中 K 和 Ca 的含量。此外，与对照相比，0.5 mM GABA 和章鱼胺在盐胁迫下还显著降低了叶片、茎、铃和种子中 Cl 和 Na 的含量。叶绿素含量、气体交换特性的显著提高和电解质渗漏的显著降低验证了 0.5 mM GABA 和章鱼胺的有效性。总之，0.5 mM GABA 和章鱼胺有可能减轻棉花的盐胁迫。
