近期论文
当前:澳门皇冠金沙官网娱乐 - 科技成果 - 近期论文

Optimized nitrogen management enhances lodging resistance of rice and its morpho-anatomical, mechanical, and molecular mechanisms

发布时间:2020/4/30来源:澳门皇冠金沙官网娱乐

Junfeng Pan1,2,4, JunliangZhao1,2,4, Yanzhuo Liu1,2, Nongrong Huang1,2, KaTian1,2, Farooq Shah3, Kaiming Liang1,2, XuhuaZhong1,2* & Bin Liu1,2*

Scientific Reports

Abstract

Increasing evidence shows that improved nitrogen management can enhance lodging resistance  and lower internodes play a key role in the lodging resistance of rice. However, little is known about  the cellular and molecular mechanisms underlying the enhanced lodging resistance under improved  nitrogen management. In the present study, two rice varieties, with contrasting lodging resistance,  were grown under optimized N management (OPT) and farmers’ fertilizer practices. Under OPT, the  lower internodes of both cultivars were shorter but the upper internodes were longer, while both culm  diameter and wall thickness of lower internodes were dramatically increased. Microscopic examination  showed that the culm wall of lower internodes under OPT contained more sclerenchyma cells beneath  epidermis and vascular bundle sheath. The genome-wide gene expression profling revealed that  transcription of genes encoding cell wall loosening factors was down-regulated while transcription of  genes participating in lignin and starch synthesis was up-regulated under OPT, resulting in inhibition of  longitudinal growth, promotion in transverse growth of lower internodes and enhancement of lodging  resistance. This is the frst comprehensive report on the morpho-anatomical, mechanical, and molecular mechanisms of lodging resistance of rice under optimized N management.


附件:Optimized nitrogen management enhances lodging resistance of rice and its morpho-anatomical, mechanical, and molecular mechanisms

版权所有:澳门皇冠金沙官网娱乐-澳门皇冠金沙官网娱乐 粤CIP备12058351号-2 地址:广州市金颖东一街3号 邮编:510640
XML 地图 | Sitemap 地图