Application of γ-aminobutyric acid under low light conditions: Effects on yield, aroma, element status, and physiological attributes of fragrant rice

Ecotoxicology and Environmental Safety

Yuzhan Li¹  Shenggang Pan²  Zhaowen Mo³  Yanhong Li⁴  Umair Ashraf⁴  Xiangru Tang⁴  Hua Tian⁴  Wenjun Xie⁴  Lin Ma⁴ 

[1] Agro-innovative Demonstration Base Guangdong Academy of Agricultural Sciences, Guangzhou 510642, Guangdong, China;Department of Botany, Division of Science and Technology, University of Education, Lahore 54770, Punjab, Pakistan;Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Affairs, Guangzhou 510642, China;State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Agriculture, South China Agricultural University, Guangzhou 510642, China;

关键词: Fragrant rice;    γ-aminobutyric acid;    Low light;    2-acetyl-1-pyrroline;    Grain yield;   

DOI  :  

来源: DOAJ

【 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 γ-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.

【 授权许可】

Unknown