College of Life and Health Science, Anhui Science and Technology University, Fengyang, 233100, China.
College of Food Science, Anhui Science and Technology University, Fengyang, 233100, China.
BMC Plant Biol. 2024 Feb 26;24(1):137. doi: 10.1186/s12870-024-04792-4.
The deleterious impact of osmotic stress, induced by water deficit in arid and semi-arid regions, poses a formidable challenge to cotton production. To protect cotton farming in dry areas, it's crucial to create strong plans to increase soil water and reduce stress on plants. The carboxymethyl cellulose (CMC), gibberellic acid (GA) and biochar (BC) are individually found effective in mitigating osmotic stress. However, combine effect of CMC and GA with biochar on drought mitigation is still not studied in depth. The present study was carried out using a combination of GA and CMC with BC as amendments on cotton plants subjected to osmotic stress levels of 70 (70 OS) and 40 (40 OS). There were five treatment groups, namely: control (0% CMC-BC and 0% GA-BC), 0.4%CMC-BC, 0.4%GA-BC, 0.8%CMC-BC, and 0.8%GA-BC. Each treatment was replicated five times with a completely randomized design (CRD). The results revealed that 0.8 GA-BC led to increase in cotton shoot fresh weight (99.95%), shoot dry weight (95.70%), root fresh weight (73.13%), and root dry weight (95.74%) compared to the control group under osmotic stress. There was a significant enhancement in cotton chlorophyll a (23.77%), chlorophyll b (70.44%), and total chlorophyll (35.44%), the photosynthetic rate (90.77%), transpiration rate (174.44%), and internal CO concentration (57.99%) compared to the control group under the 40 OS stress. Thus 0.8GA-BC can be potential amendment for reducing osmotic stress in cotton cultivation, enhancing agricultural resilience and productivity.
在干旱和半干旱地区，由于缺水导致的渗透胁迫会对棉花生产造成严重影响。为了保护干旱地区的棉花种植，必须制定强有力的计划来增加土壤水分并减轻植物的压力。羧甲基纤维素（CMC）、赤霉素（GA）和生物炭（BC）单独使用时都可以减轻渗透胁迫。然而，CMC 和 GA 与生物炭联合作用对缓解干旱的影响在深度上仍未得到充分研究。本研究通过将 GA 和 CMC 与 BC 结合作为对渗透胁迫水平为 70（70 OS）和 40（40 OS）的棉花植株的改良剂进行。有五个处理组，分别为：对照（0%CMC-BC 和 0%GA-BC）、0.4%CMC-BC、0.4%GA-BC、0.8%CMC-BC 和 0.8%GA-BC。每个处理重复五次，采用完全随机设计（CRD）。结果表明，与对照组相比，在渗透胁迫下，0.8GA-BC 可使棉花茎鲜重（99.95%）、茎干重（95.70%）、根鲜重（73.13%）和根干重（95.74%）增加。与对照组相比，在 40 OS 胁迫下，棉花叶绿素 a（23.77%）、叶绿素 b（70.44%）和总叶绿素（35.44%）、光合速率（90.77%）、蒸腾速率（174.44%）和内部 CO 浓度（57.99%）均显著提高。因此，0.8GA-BC 可以作为减轻棉花种植中渗透胁迫、提高农业弹性和生产力的潜在改良剂。
