脱落酸
水杨酸
蒸腾作用
水稻
光合作用
苗木
栽培
气孔导度
生物
抗氧化剂
丙二醛
园艺
农学
植物生理学
植物
生物化学
基因
作者
Guanjie Chen,Dianfeng Zheng,Naijie Feng,Hang Zhou,Dewei Mu,Ling Liu,Liming Zhao,Xuefeng Shen,G. S. Rao,Tianzi Li
出处
期刊:Chilean Journal of Agricultural Research
日期:2022-03-01
卷期号:82 (1): 21-32
被引量:12
标识
DOI:10.4067/s0718-58392022000100021
摘要
The key function of plant growth regulators is to adjust the growth and development of plants to adapt to the changing environment, which plays a vital role in the growth and yield of crops. This study was aimed to evaluate the ability of foliar application of salicylic acid (SA) and abscisic acid (ABA) to regulate rice (Oryza sativa L.) growth quality at seedling stage and reproductive stage. The two rice cultivars Wanshengyoutianhong-4 (W4) and Huanghuazhan (HZ) were sprayed foliar with SA (100 mg L-1) and ABA (4 mg L-1) at two-leaf stage, and their effects on morphological growth, physiological characteristics, malondialdehyde (MDA), osmotic substances, protective enzyme activities, photosynthesis and yield components were studied. Results indicated that SA and ABA significantly increased morphological growth, osmotic substances, antioxidant enzyme activities; MDA content dropped significantly (p < 0.05) in W4. While the two regulators inhibited morphological growth and physiological characteristics in HZ. Additionally, net photosynthesis, stomatal conductance, transpiration rate, water use efficiency and apparent mesophyll conductance were improved in both of rice cultivars at heading stage as well as grain weight. In conclusion, foliar spray of SA and ABA enhanced plant growth, induced an increase in protective enzyme activities and reduced the oxidative damage of the hybrid rice cultivar but not of the conventional rice cultivar at seedling stage. Meanwhile, photosynthetic parameters and grain weight were slightly enhanced at reproductive stage. These results served as a theoretical basis and technical support for the chemical regulation and cultivation practices of rice.
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