Application of gamma-aminobutyric acid under low light conditions: Effects on yield, aroma, element status, and physiological attributes of fragrant rice
文献类型： 外文期刊
作者： Xie, Wenjun 1 ; Li, Yanhong 1 ; Li, Yuzhan 1 ; Ma, Lin 1 ; Ashraf, Umair 1 ; Tang, Xiangru 1 ; Pan, Shenggang 1 ; Tian, H 1 ;
作者机构： 1.South China Agr Univ, Coll Agr, State Key Lab Conservat & Utilizat Subtrop Agrobi, Guangzhou 510642, Peoples R China
2.Guangdong Acad Agr Sci, Agroinnovat Demonstrat Base, Guangzhou 510642, Guangdong, Peoples R China
3.Univ Educ, Dept Bot, Div Sci & Technol, Lahore 54770, Punjab, Pakistan
4.Minist Agr & Rural Affairs, Sci Observing & Expt Stn Crop Cultivat South Chin, Guangzhou 510642, Peoples R China
5.Guangzhou Key Lab Sci & Technol Fragrant Rice, Guangzhou 510642, Peoples R China
关键词： Fragrant rice; gamma-aminobutyric acid; Low light; 2-acetyl-1-pyrroline; Grain yield
期刊名称：ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY （ 影响因子：4.872； 五年影响因子：4.966 ）
ISSN： 0147-6513
年卷期： 2021 年 213 卷
页码：
收录情况： SCI
摘要： Cloudy weather with low light is more common during rice growing season of South China which often leads reduced yield and aroma formations in fragrant rice. However, exogenous gamma-aminobutyric acid (GABA) application could enhance the 2-acetyl-1-pyrroline (2AP) accumulations and yield of fragrant rice under low light conditions. Field and pot experiments were conducted with three fragrant rice cultivars i.e., Basmati and Yuxiangyouzhan (indica), and Yungengyou 14 (japonica) that were grown under three different treatments i.e., normal light + GABA 0 mg L-1 (CK), low light + GABA 0 mg L-1 (T1), and low light + GABA 250 mg L-1 (T2). The results revealed that the grain 2AP contents were increased by 14.67-34.83% and up to 29.34% under T1 and T2 treatments in pot and field experiments, respectively, as compared with CK. The T1 and T2 treatments improved aroma owing to regulation in the accumulation of micronutrients i.e., Na, Mn, and Fe and enzyme activities involved in 2AP biosynthesis. The grain yield was substantially reduced in T1 as compared with T2 treatment for all rice cultivars. On the other hand, GABA application improved the grain yield under low light conditions by regulating the plant growth, and related physiological and biochemical attributes in all rice cultivars. Thus, GABA could balance low light-induced 2AP content and grain yield by modulating morphological and yield related attributes as well as physio-biochemical responses of fragrant rice.
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