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苗期玉米叶片碳氮平衡与干旱 诱导的叶片衰老之关系
熊炳霖1,2; 王鑫月1,2; 陈道钳3; 王仕稳1,3; 殷俐娜1,3
2016
Source Publication西北植物学报
Volume36Issue:3Pages:534-541
Abstract

为了探究干旱诱导的碳氮平衡破坏与干旱诱导的叶片衰老之间的关系,该实验以8个在干旱胁迫下叶片
衰老进程有明显差异的玉米品种为实验材料,采用PEG模拟干旱处理,通过测定光合速率、叶绿素含量和叶绿素
荧光参数等叶片衰老指标以及非结构性碳水化合物(可溶性糖、淀粉)和全氮含量等变化,分析玉米中干旱诱导的
叶片衰老与叶片中碳氮平衡(碳氮比)之间的关系。结果显示:(1)干旱胁迫下,8个玉米品种叶片净光合速率受到
严重抑制,Fv/Fm
大幅下降,叶绿素含量显著降低,说明干旱诱导了玉米叶片的衰老;(2)干旱诱导玉米叶片衰老的
同时,8个玉米品种的叶片中可溶性糖含量显著升高,淀粉含量小幅上升,全氮含量大幅降低,碳氮比显著升高,碳
氮平衡遭到了破坏;(3)8个玉米品种叶片的叶绿素含量与非结构性碳水化合物含量以及碳氮比呈极显著负相关关
系,与全氮含量呈极显著正相关关系。因此,碳氮代谢与干旱诱导的叶片衰老紧密联系,碳氮平衡可能参与了干旱
诱导的叶片衰老调控。

Other Abstract

To investigate the association between drought-induced carbon/nitrogen imbalance and leaf senescence,
we treated eight maize varieties in leaf senescence progress under drought stress with PEG to mimic
the drought stress.Leaf senescence symptoms,such as photosynthesis,photosystem II photochemistry efficiency(
Fv/Fm)and chlorophyll content,and the non-structural carbohydrates(soluble sugars,starch)content
and nitrogen content were determined.Then,the correlation between drought-induced leaf senescence
and carbon/nitrogen imbalance(C/N ratio)was analyzed.Our results showed that:(1)the net photosynthetic
of eight maize varieties were severely suppressed,Fv/Fmhas fallen dramatically and chlorophyll content decreased significantly,which indicated that drought induced maize leaf senescence.(2)Drought stress
induced the maize leaf senescence accompanied with the accumulation of soluble sugar content,slightly increased
starch content,decreased of total nitrogen content and increased significantly of C/N ratio,carbon
and nitrogen balance were damaged.(3)Both the non-structural carbohydrates content and carbon/nitrogen
ratio showed a significant negative correlation with chlorophyll content,and there was a significant positive
correlation between total nitrogen content and chlorophyll content.Therefore,carbon and nitrogen metabolisms
were tightly associated with drought-induced leaf senescence,and the carbon/nitrogen balance may
involve in the regulation of drought-induced leaf senescence.

Keyword玉米 干旱 叶片衰老 碳氮平衡
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8654
Collection水保所知识产出(1956---)
Affiliation1.中国科学院水利部水土保持研究所,黄土高原土壤侵蚀与旱地农业国家重点实验室
2.中国科学院大学
3.西北农林科技大学水土保持研究所
First Author Affilication中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
熊炳霖,王鑫月,陈道钳,等. 苗期玉米叶片碳氮平衡与干旱 诱导的叶片衰老之关系[J]. 西北植物学报,2016,36(3):534-541.
APA 熊炳霖,王鑫月,陈道钳,王仕稳,&殷俐娜.(2016).苗期玉米叶片碳氮平衡与干旱 诱导的叶片衰老之关系.西北植物学报,36(3),534-541.
MLA 熊炳霖,et al."苗期玉米叶片碳氮平衡与干旱 诱导的叶片衰老之关系".西北植物学报 36.3(2016):534-541.
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