中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
干旱及复水对玉米叶片光合特性的影响

文献类型:期刊论文

作者姚春霞 ; 张岁岐 ; 燕晓娟
刊名水土保持研究
出版日期2012
卷号19期号:03页码:278-283
关键词玉米 干旱胁迫 复水 光合 叶绿素荧光 叶水势
其他题名Effects of Drought and Re-watering on Photosynthetic
中文摘要 盆栽条件下,以玉米品种户单4号为材料,设正常供水(CK)、中度水分胁迫(MS)和重度水分胁迫(SS)三个水分处理,研究了拔节期和孕穗期水分胁迫及复水对玉米叶片光合、叶绿素荧光的影响,以期为玉米补偿机制的阐明提供理论依据。结果表明:(1)干旱胁迫使叶水势(ψleaf)降低,复水后拔节期重度胁迫叶水势迅速恢复并超过对照,而孕穗期则恢复缓慢;(2)拔节期和孕穗期重度胁迫降低了叶片净光合速率(Pn)、气孔导度(Gs)、胞间CO2浓度(Ci)、PSII最大光化学效率(Fv/Fm)及光化学猝灭系数(qP),但复水5d后可基本恢复至对照;Ci最低,气孔限制值(Ls)较对照分别增加了6.85%,9.52%,Fv/Fm值分别降低了1.72%和0.61%,表明气孔限制是Pn降低的主要原因;(3)拔节期重度胁迫叶的水分利用效率(WUE)高于对照,表现出补偿效应;孕穗期干旱胁迫下WUE表现为:MS>CK>SS,在复水第一天达最大值,随后趋于降低。说明拔节期和孕穗期光合特性变化存在差异性。
英文摘要Abstract:In this study,Maize(Zea mays L.)cross seeds(cv.Hudan4)were grown in pots.And three water
 treatments:normal water supply(CK),moderate water stress(MS)and severe water stress(SS)were
designed to investigate the effects of water stress and re-watering on photosynthesis and chlorophyll fluorescence
 of maize leaf at elongation stage and booting stage,in order to provide theoretical basis for the explanation
 of compensation mechanism of maize.The results showed:(1)leaf water potential(ψleaf)reduced under
drought stress,and leaf water potential of severe stress at elongation stage could recover rapidly and exceeded
 the control after re-watering,but the booting stage was slow;(2)severe stress at elongation stage and
booting stage reduced the leaf net photosynthetic rate(Pn),stomatal conductance(Gs),the intercellular CO2
concentration(Ci),maximal efficiency of PSⅡ (Fv/Fm)and photochemical quenching coefficient(qP),but
after five days of re-watering,these parameters can be recovered to control;the Ci was lowest,compared
with control,stomatal limation value(Ls)increased by 6.85%,9.52%,Fv/Fmreduced 1.72%and 0.61%,
which indicated stomatal limitation was the major factor to the reduction of Pn;(3)under the severe stress at
elongation stage,the water use efficiency of leaf(WUE)was higher than the control,which showed the compensation
 effect;under drought stress at booting stage,the WUE showed that MS> CK>SS.After the
first day of re-watering,the WUE were at peaks,then tended to decline.These results suggested that there
would be different responses of photosynthetic characteristic between elongation stage and booting stage.
语种中文
公开日期2014-06-24
源URL[http://ir.iswc.ac.cn/handle/361005/5292]  
专题水土保持研究所_水保所知识产出(1956-2013)
推荐引用方式
GB/T 7714
姚春霞,张岁岐,燕晓娟. 干旱及复水对玉米叶片光合特性的影响[J]. 水土保持研究,2012,19(03):278-283.
APA 姚春霞,张岁岐,&燕晓娟.(2012).干旱及复水对玉米叶片光合特性的影响.水土保持研究,19(03),278-283.
MLA 姚春霞,et al."干旱及复水对玉米叶片光合特性的影响".水土保持研究 19.03(2012):278-283.

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