Weak stem under shade reveals the lignin reduction behavior

Sajad Hussain; Nasir Iqbal; PANG Ting; Muhammad Naeem Khan; LIU Wei-guo; YANG Wen-yu

首页> 中文期刊> 《农业科学学报（英文版）》 >Weak stem under shade reveals the lignin reduction behavior

Weak stem under shade reveals the lignin reduction behavior

开具论文收录证明 >>

期刊封面封底目录下载 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Shades caused by neighboring tall plants in intercropping systems and weak sunlight are constraints in yield optimization.Shade influences many aspects of plant growth and development,leading to weak stems and susceptibility to lodging.The plant cell wall is composed of certain proteins that allow the walls to stretch out,a process called cell wall loosening.Shade affects anatomical,morphological,and physiological traits of plants,thus reducing the physical strength of the stem in crops by changing the loosening of cell walls.Flexibility of cells facilitates further modifications such as wall loosening.In addition,shade stress causes increased internode length,and reduced xylem synthesis and photosynthesis.In shaded plants,lignin deposition in vascular bundles and sclerenchyma cells of stems is decreased.Lignin is a light sensitive phenolic compound and shading decreases the transcript abundance of several phenolic compound (flavone and lignin) related genes.Shading significantly influences the metabolic activities of phenylalanine ammonia-lyase (PAL),peroxidase (POD),4-coumarate:CoA ligase (4CL),and cinnamyl alcohol dehydrogenase (CAD) involved in lignin biosynthesis.Furthermore,suppression of lignin biosynthesis activities by abiotic stresses causes abnormal phenotypes such as collapsed xylem,bent stems,and growth retardation.In this review,the underlying mechanisms illustrate that under shading conditions reduced lignin content results in slender,weak,and unstable stems.The objective of this review is to elaborate lignin biosynthesis and its variability under stressful environmental conditions,especially in shade stress environments.The effects of shade on stem lignin metabolism are discussed on the morphogenetic,physiological,and proteomic levels.

著录项

来源
《农业科学学报（英文版）》 |2019年第3期|496-505|共10页
作者
Sajad Hussain; Nasir Iqbal; PANG Ting; Muhammad Naeem Khan; LIU Wei-guo; YANG Wen-yu;
展开▼
作者单位

College of Agriculture, Sichuan Agricultural University/Key Laboratory of Ecophysiology and Farming System in Southwest China,Ministry of Agriculture, Chengdu 611130, P.R.China;

College of Agriculture, Sichuan Agricultural University/Key Laboratory of Ecophysiology and Farming System in Southwest China,Ministry of Agriculture, Chengdu 611130, P.R.China;

College of Agriculture, Sichuan Agricultural University/Key Laboratory of Ecophysiology and Farming System in Southwest China,Ministry of Agriculture, Chengdu 611130, P.R.China;

College of Agriculture, Bahauddin Zakariya University, Bahadur Sub-Campus, Layyah 31200, Pakistan;

College of Agriculture, Sichuan Agricultural University/Key Laboratory of Ecophysiology and Farming System in Southwest China,Ministry of Agriculture, Chengdu 611130, P.R.China;

College of Agriculture, Sichuan Agricultural University/Key Laboratory of Ecophysiology and Farming System in Southwest China,Ministry of Agriculture, Chengdu 611130, P.R.China;

展开▼
原文格式 PDF
正文语种 eng
中图分类
关键词

Weak stem under shade reveals the lignin reduction behavior

摘要

著录项

相关主题

期刊订阅