Shade-shoot structure, photosynthetic performance in the field, and photosynthetic capacity of evergreen conifers
نویسندگان
چکیده
منابع مشابه
Shade-shoot structure, photosynthetic performance in the field, and photosynthetic capacity of evergreen conifers.
Shoot structure can be quantified as the ratio of maximum shoot silhouette area to maximum leaf silhouette (projected) area (R(max)). I have used published studies on the effects of shade-shoot structure on photosynthetic production of evergreen conifer stands to test the hypothesis that the lower crown of stands of species with a high R(max) contributes significantly to photosynthetic producti...
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1. The capacity to perform photosynthesis, given appropriate environmental conditions, is reflected by measurements of the maximum quantum yield of photosystem II ( F v / F m ). The seasonal course of F v / F m may help define the length of the annual photosynthetic period in temperate evergreen forests. 2. F v / F m was measured 31 times from September to May on six conifer species located alo...
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متن کاملPhotosynthetic units of sun and shade plants.
A computer analysis of fluorescence induction curves of leaves treated with 3-(3,4-dichlorophenyl)-1,1 dimethylurea was done for several species. These measurements gave the ratios of the total chlorophyll to photosystem II reaction centers. This communication is a preliminary survey of sun and shade plants and demonstrates a significant variation in this ratio. In the sun plants, the photosynt...
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ژورنال
عنوان ژورنال: Tree Physiology
سال: 1996
ISSN: 0829-318X,1758-4469
DOI: 10.1093/treephys/16.1-2.109