干旱区生态环境知识资源中心(Arid): 干旱胁迫下5种幼苗光合特性的研究

Arid

	干旱胁迫下5种幼苗光合特性的研究
其他题名	Studies on Seedling Photosynthetic Characteristics of Five Tree Species under Drought Stress
	韩博 1; 李志勇 2; 郭浩 3; 张俊佩 1
来源期刊	林业科学研究
ISSN	1001-1498
出版年	2014
卷号	27 期号:1 页码:92-98
中文摘要	以该区年龄相同的5种主要植被恢复树种车桑子、滇柏、侧柏、花椒和香樟幼苗为研究对象,通过盆栽控水试验,测算其在不同水分梯度下的叶绿素相对含量、净光合速率、蒸腾速率、气孔导度、胞间CO_2浓度以及水分利用效率等生理生态指标,系统比较各参数的适应性变化及其差异性分析,结果表明:(1)随着干旱胁迫的加剧,5种幼苗叶片叶绿素相对含量呈现不同的变化趋势,车桑子逐渐降低,侧柏和滇柏先降后升,花椒和香樟先升后降;(2)各光合生理生态参数也呈现不同的变化规律:随干旱胁迫的加剧,净光合速率、蒸腾速率、气孔导度均逐渐降低,且在中度和重度干旱胁迫时极显著降低,其中在重度干旱胁迫时,侧柏的净光合速率最低比对照下降了100.5%,下降幅度最大;胞间CO_2浓度在轻度干旱胁迫时下降,中度和重度干旱胁迫时上升;水分利用效率在轻度和中度干旱胁迫时增加,重度干旱胁迫时下降,其中香樟的水分利用效率在重度干旱胁迫时仍是对照的1.05倍;(3)综合分析各项生理生态参数,5种幼苗均能耐受一定程度的干旱胁迫,但香樟的控水耐旱能力明显高于其它4种树种,更能适应石漠化地区的生态环境。
英文摘要	In order to provide theoretical basis for vegetation restoration in rocky desertification district, the seedlings of 5 tree species, Dodonaea viscosa (Linn.) Jacq.,Fokienia hodginsii (Dunn) Henry et Thomas, Platycladus orientalis (Linn.) Franco, Zanthoxylum bungeanum Maxim, and Cinnamonum camphora L. with same age in the district were used as study objects, through potted water control experiments, to measure and calculate the chlorophyll content, net photosynthetic rate,transpiration rate,stomatal conductance,intercellular CO_2 concentration, water use efficiency, and some other physiological and ecological index, and the adaptabilities and differences among the 5 tree species under different moisture gradients were compared. The results are as follows. (1) With the increasing drought stress,the chlorophyll content of 5 tree species changed in different levels,D. viscosa showed a trend of gradually reducing,P. orientalis and F. hodginsii showed a trend of decrease and then increase,while Z. bungeanum and C. camphora showed a trend of increase and then decrease; (2) The physiological and ecological parameters expressed different variation : the net photosynthetic rate, transpiration rate, and stomatal conductance showed decreasing trends,and under moderate and severe drought stress,they reduced significantly,the net photosynthetic rate of P. orientalis decreased by 100. 5%, which was the sharpest decline under severe drought stress ; the intercellular CO_2 concentration dropped under mild drought stress,while increased under moderate and severe drought stress ; the water use efficiency increased under mild and moderate drought stress,but decreased under severe drought stress ; the water use efficiency of C. camphora decreased under severe drought,but still 1. 05 times that of the contrast. (3) Based on a comprehensive analysis of the physiological and ecological indexes,it showed that all the seedlings could tolerate a certain degree of drought stress,belonging to the stronger drought-resistant a-bility trees,but the water control drought tolerance ability of C. camphora was higher than that of the other 4 species and is more capable to adapt to environment of rocky desertification district.
中文关键词	石漠化 ; 幼苗 ; 干旱胁迫 ; 光合特性
英文关键词	rocky desertification seedlings drought stress photosynthetic characteristics
语种	中文
国家	中国
收录类别	CSCD
WOS类目	FORESTRY
WOS研究方向	Forestry
CSCD记录号	CSCD:5087951
来源机构	中国林业科学研究院荒漠化研究所 ; 中国林业科学研究院林业研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/231436
作者单位	1.中国林业科学研究院林业研究所, 林木遗传育种国家重点实验室;;国家林业局林木培育重点实验室, 北京 100091, 中国; 2.河南科技大学农学院, 洛阳, 河南 471000, 中国; 3.中国林业科学研究院荒漠化研究所, 北京 100091, 中国
推荐引用方式 GB/T 7714	韩博,李志勇,郭浩,等. 干旱胁迫下5种幼苗光合特性的研究[J]. 中国林业科学研究院荒漠化研究所, 中国林业科学研究院林业研究所,2014,27(1):92-98.
APA	韩博,李志勇,郭浩,&张俊佩.(2014).干旱胁迫下5种幼苗光合特性的研究.林业科学研究,27(1),92-98.
MLA	韩博,et al."干旱胁迫下5种幼苗光合特性的研究".林业科学研究 27.1(2014):92-98.