干旱区生态环境知识资源中心(Arid): 水分胁迫对四倍体刺槐苗生长和光合作用的影响

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	水分胁迫对四倍体刺槐苗生长和光合作用的影响
其他题名	Effects of Water Stress on Biomass and Photosynthetic Characteristics of Tetraploid Black Locust(Robinia pseudoacacia L.) Clones
	张怡; 沈应柏; 罗晓芳
来源期刊	林业科学研究
ISSN	1001-1498
出版年	2010
卷号	23 期号:6 页码:920-923
中文摘要	刺槐是我国三北地区的主要防护造林树种,尤其是西北干旱,半干旱地区有广泛的种植;但由于当地气候条件的制约,刺槐难于获得生长所需的足够水分[1],生长受到严重抑制,在黄土高原出现了大面积的"小老树"和低劣残次林[2-4],其生态,经济效益都很低.引进和筛选耐旱能力强,水分利用效率高的刺槐新品种是当前该地区植被恢复工作中亟待解决的重要问题.四倍体刺槐是近年来作者从韩国引进的新品种,具有速生,叶营养成分高,适应性强等优点,在黄土高原已有少量栽植,但尚未见对四倍体刺槐耐旱性的研究报道.研究四倍体刺槐的耐旱机理,对于四倍体刺槐在干旱半干旱地区的推广应用具有一定的科学意义
英文摘要	Differences in drought tolerance were studied among three strains of black locust(Robinia pseudoacacia L.) clones(one-year-old micropropagated K2,K3 clones and a common diploid clone CK) under simulated natural drought conditions. The experiment was carried out as a randomized complete blocks design. The following physiological variables were examined, biomass and allocation, photosynthetic characteristics,i.e.net photosynthetic rate(Pn), transpiration rate(E), stomatal conductance(Gs), intercellular CO2 concentration(Ci), instantaneous water use efficiency(WUEI), and long-term water use efficiency(WUEL). Results showed that the K2 and K3 had greater biomass, with the K3 displaying favorable ratio of root biomass to shoot and leaf biomass. Net photosynthetic rate(Pn) declined along with Gs, Ci and the ratio intercellular/ambient(Ci/Ca), under increasing drought stress. The decline in photosynthesis was mainly due to stomatal limitation. The K2 and K3 showed higher WUE and Pn than the CK. There were significant differences of drought level on WUEL, and the WUEL of K2 and K3 was greater than that of CK. Evaluation based overall physiological characteristics indicates the K2 and K3 are more drought tolerant, which are well adapted to the drought-stricken area of Northwest China
中文关键词	四倍体刺槐 ; 水分胁迫 ; 生物量 ; 光合参数 ; 长期水分利用效率
英文关键词	tetraploid black locust(Robinia pseudoacacia L.) clone water stress biomass photosynthesis long-term WUE
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Forestry
CSCD记录号	CSCD:4097859
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378679
作者单位	张怡, 北京林业大学生物科学与技术学院, 北京 100083, 中国.; 沈应柏, 北京林业大学生物科学与技术学院, 北京 100083, 中国.; 罗晓芳, 北京林业大学生物科学与技术学院, 北京 100083, 中国.
推荐引用方式 GB/T 7714	张怡,沈应柏,罗晓芳. 水分胁迫对四倍体刺槐苗生长和光合作用的影响[J],2010,23(6):920-923.
APA	张怡,沈应柏,&罗晓芳.(2010).水分胁迫对四倍体刺槐苗生长和光合作用的影响.林业科学研究,23(6),920-923.
MLA	张怡,et al."水分胁迫对四倍体刺槐苗生长和光合作用的影响".林业科学研究 23.6(2010):920-923.