کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
143315 163198 2008 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Why are evergreen leaves so contrary about shade?
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Why are evergreen leaves so contrary about shade?
چکیده انگلیسی

Leaf mass per area (LMA) is one of the most widely measured of all plant functional traits. In deciduous forests, there is similarity between plastic and evolutionary responses of LMA to light gradients. In evergreens, however, LMA is lower in shaded than sunlit individuals of the same species, whereas shade-tolerant evergreens have higher LMA than light-demanders grown under the same conditions. We suggest that this pattern of ‘counter-gradient variation’ results from some combination of (i) close evolutionary coordination of LMA with leaf lifespan, (ii) selection for different leaf constitutions (relative investment in cell walls versus cell contents) in sun and shade environments and/or (iii) constraints on plasticity as a result of genetic correlations between phenotypes expressed in sun and shade.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: - Volume 23, Issue 6, June 2008, Pages 299–303
نویسندگان
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