Regulation of sucrose synthase and its association with grain filling in spermine-treated rice plant under water deficit

Journal of plant interactions

article

Zulkarami Berahim¹  Deivaseeno Dorairaj¹  Halimi Mohd Saud³  Mohd Razi Ismail¹ 

[1] a Laboratory of Climate-Smart Food Crop Production, Institute of Tropical Agriculture, Universiti Putra Malaysia;b Institute of Biological Sciences, Faculty of Science, University of Malaya;c Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysia;d Department of Agriculture Technology, Faculty of Agriculture, Universiti Putra Malaysia

关键词: Grain filling;    rice;    sink strength;    spermine (SPM);    sucrose synthase (SUS);    water stress;   

DOI  :  10.1080/17429145.2019.1657189

学科分类：纳米科学和纳米技术

来源: Taylor & Francis

【 摘 要 】

Spermine (SPM) was utilized to investigate its impact on the accumulation of sucrose synthase (SUS) and the role of SUS as a predictor of sink strength of rice under cyclic water stress. Treatments which consisted of control and SPM were arranged in a randomized complete block design. Biochemical analyses showed significantly higher contents of sucrose, starch and carbohydrate in SPM-treated panicles which pointed to increased loading of sucrose into the grains or conversion of sucrose into starch. Besides, the expression of SUS gene was up-regulated in both inferior and superior spikelets at twenty and three fold, respectively. Correspondingly, SUS enzyme showed an increase in its activity. The high expression of SUS3 during grain filling is linked to the increased capacity for starch synthesis. Grain weight and grain filling rate of SPM-treated spikelets improved due to their large sink capacity and increased number of spikelets per panicle.

【 授权许可】

CC BY|CC BY-NC