Response of leaf anatomy of Chenopodium acuminatum to soil resource availability in a semi-arid grassland

被引:31
作者
Chen, Fu-Sheng [1 ,2 ]
Zeng, De-Hui [2 ]
Fahey, Timothy J. [3 ]
Yao, Cheng-Yi [1 ]
Yu, Zhan-Yuan [2 ]
机构
[1] Nanchang Univ, Coll Life Sci, Nanchang 330031, Peoples R China
[2] Chinese Acad Sci, Inst Appl Ecol, Daqinggou Ecol Stn, Shenyang 110016, Peoples R China
[3] Cornell Univ, Dept Nat Resources, Ithaca, NY 14853 USA
基金
中国国家自然科学基金;
关键词
Leaf thickness; Nitrogen; Palisade parenchyma; Phosphorus; Water; NITROGEN NUTRITION; WATER-STRESS; NUTRIENT; AREA; MASS; IRRADIANCE; EXPANSION; PLANTS; CHINA; THICKNESS;
D O I
10.1007/s11258-010-9778-x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Soil water (W), nitrogen (N), and phosphorus (P) availability were manipulated for 2 years in a factorial experiment in a semi-arid grassland in the southeastern Keerqin Sandy Lands, China, to determine what soil resource(s) limits plant growth. We quantified the responses of leaf chemical and anatomical traits for the dominant annual herb Chenopodium acuminatum in this ecosystem to test hypotheses about leaf form and function in relation to soil resource limitation. Nitrogen was the principal limiting factor, and N treatments (alone and in combination with W and P) elicited consistent increases in leaf size and decreases in leaf thickness and water content. Differentiation in the leaf mesophyll between palisade and spongy parenchyma was lacking in N deficient plants and stimulated in all +N treatments. The greater tissue density and cell packing may promote more efficient light capture with improved N nutrition. Mixed additions of W, N, and P were generally more advantageous to leaf expansion and nutrient balance than their isolated additions, therefore water and nutrients synchronous management would be a better approach to promote plant growth at the semi-arid region.
引用
收藏
页码:375 / 382
页数:8
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