干旱区生态环境知识资源中心(Arid): 干旱对桑树叶片光系统Ⅱ活性的影响

Arid

	干旱对桑树叶片光系统Ⅱ活性的影响
其他题名	Effects of drought stress on PSⅡ photochemical activity in leaves of Morus alba
	滕志远; 张会慧; 代欣; 胡举伟; 张秀丽; 孙广玉
来源期刊	浙江农业学报
ISSN	1004-1524
出版年	2016
卷号	28 期号:1 页码:1-8
中文摘要	栽植桑树既有防风固沙的生态价值,又具有增加农民收入的多种经济效益。随着国家"东桑西移,南蚕北移"工程的实施,栽桑业逐渐由湿润区域向干旱地区转移。干旱胁迫对于桑树光系统Ⅱ(PSⅡ)活性影响的生理机制尚不明确,该研究利用快速叶绿素荧光技术,研究干旱胁迫对桑树叶片PSⅡ活性的影响。结果表明:干旱胁迫导致叶片光系统Ⅱ活性受到明显的抑制,桑树叶片光反应中心潜在活性(F_v/F_o)和以光吸收为基础的光合性能指数(PI_(ABS))均显著低于对照,但干旱协迫对桑树叶片最大光化学效率(F_v/F_m)的影响不显著。干旱处理的桑树叶片PSⅡ电子受体侧的电子由Q_A向Q_B传递受阻,同时P_Q库和Q_B的电子接受能力下降,进而增加了Q_A~-的积累量;同时PSⅡ电子供体侧放氧复合体(OEC)的活性下降,导致PSⅡ活性受到抑制。由此可知,重度干旱抑制桑树PSⅡ光化学活性的生理机制可能是降低PSⅡ受体侧电子传递能力,同时桑树叶片OEC活性也受到伤害。
英文摘要	Planting mulberry (Morus alba) not only had ecological value including windbreak and sand-fixation, but also had a variety of economic benefits, such as increasing farmers’ income. With the implementing of "mulberry should be planting from southeast to northwest region", the industry of mulberry is moving from the wet area to arid regions. The physiological mechanism of drought stress on photosystemⅡ (PSⅡ) photochemical activity have been not clear up to now, so effects of drought stress on PSⅡ photochemical activity in mulberry leaves were investigated with chlorophyll a fluorescence transient (OJIP curve) in this study. The results showed that potential photochemical efficiency of PSⅡ (F_v/F_o) and photosynthetic performance index (PI_(ABS)) based on light absorption were significantly lower than the control, which indicated that photo-activity of leaf could be inhibited by drought stress. Maximal photochemical efficiency of PSⅡ (F_v/F_m) did not have a remarkable change. The electron transmission from Q_A to Q_B in PSⅡ electronic receptor side was relatively decreased in normalized OJIP curve, and electron-accepting ability of PQ electronic library and Q_B were also decreased, which increased the accumulation of Q_A~-. Meanwhile, the activity of oxygen evolution complex (OEC) in PSⅡ electronic receptor side was inhibited, and then the photochemical activity of PSⅡ was seriously inhibited. So serious drought stress could inhibit photochemical activity of PSⅡ in mulberry, the mechanism of which might be reducing the electron transport ability in PSⅡ acceptor side and damaging the activity of OEC.
中文关键词	桑树 ; 干旱胁迫 ; 光系统Ⅱ ; 荧光动力学曲线
英文关键词	mulberry drought stress photosystemⅡ chlorophyll fluorescence kinetics
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
WOS研究方向	Agriculture
CSCD记录号	CSCD:5664084
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235287
作者单位	滕志远, 东北林业大学生命科学学院, 哈尔滨, 黑龙江 150040, 中国.; 代欣, 东北林业大学生命科学学院, 哈尔滨, 黑龙江 150040, 中国.; 胡举伟, 东北林业大学生命科学学院, 哈尔滨, 黑龙江 150040, 中国.; 张秀丽, 东北林业大学生命科学学院, 哈尔滨, 黑龙江 150040, 中国.; 孙广玉, 东北林业大学生命科学学院, 哈尔滨, 黑龙江 150040, 中国.; 张会慧, 东北农业大学资源与环境学院, 哈尔滨, 黑龙江 150030, 中国.
推荐引用方式 GB/T 7714	滕志远,张会慧,代欣,等. 干旱对桑树叶片光系统Ⅱ活性的影响[J],2016,28(1):1-8.
APA	滕志远,张会慧,代欣,胡举伟,张秀丽,&孙广玉.(2016).干旱对桑树叶片光系统Ⅱ活性的影响.浙江农业学报,28(1),1-8.
MLA	滕志远,et al."干旱对桑树叶片光系统Ⅱ活性的影响".浙江农业学报 28.1(2016):1-8.