,and rate of photosynthesis were measured respectively. Based on these values,the results showed that:(i) Pteris vittata,Angiopteris fokiensis,and Dryopteris erythrosora were the best shade-tolerance species,and Cibotium barometz,Petris multifida,etc.
Seedlings of pioneer tree species had higher or comparable RGR (mean RGR for 1～5 years: 0. 944～1. 555 cf. 0.765～ 1. 402 g·g-1·a-1 ) but slower accumulative biomass growth than the seedlings in the forest in much poorer soil.
The initial stage light compensation point of A nepalensis was 12 μmol/m 2 s, and the light saturation point was 1 000 μmol/m 2 s, which indicated that the seedling of this species was tolerant to shade at initial stage and adapted to grow in shade of 50 % of full light.
The main results are as follows: 1.C. arachnoidea was a C 3 type solaphilic and shade tolerant herb. Its light saturation point was about 650 μmol·m -2 ·s -1 and the light compensation point was about 17 μmol·m -2 ·s -1 .Its CO 2 compensation point was about 130×10 -6 . 2.The maximum net photosynthetic rate of C.
The photosynthetic physiologic characteristics of Shibataea hispida were studied,the results indicated that S.hispida had a higher saturation point of 1 450 μmol·m~(-2)·s~(-1) and a quite lower light compensation point of approximate 14.4 μmol·m~(-2)·s~(-1),belonging to heliophytic bamboo species, but it also could tolerate shade, and being suitable to a multiple light condition.
Species represented a range of shade tolerance, but all individuals were measured in light gaps to control for environmental conditions and the availability of herbivores.
C4 grasses are virtually absent from shaded habitats, and the biochemical model is employed to examine the implications of IVD for shade-tolerance in C4 grasses.
We examined saplings and mature trees of paper birch, yellow birch, red maple and sugar maple, which varied in successional status (shade-tolerance) and co-occurred at Harvard Forest, Petersham, Mass., USA.
The city of Lanehow lies in the central part of China in latitude approximate 36°03′north, longitude 103°57＇east, at elevation 1,508.53 M. Kowlanshan, the area surveyed, being one of the many loess plateau hills surrounding Lanchow, situates on the southeastern suburb of the city. Physiographically, the area is a part of the dissected loess plateau with an altitude of 1,508-2100 M. Owing to the influences of the geographical condition and high elevation, the climate of this area is of continental climatic ...
In this paper we have studied the effect of different light intensities on some photosynthetic properties of Setaria italica and Arachis hypogaca after shading treatment. The effects are expressed as follws: The light compensation and saturation point of both crops are descended; Under lower light intensity, the rate of apparent photosynthesis and initial slope of light-photosynthetic curve are ascended; Especially, the rate of relative photosynthesis increases distinctly. Simultaneously, the chlorophyll an...
In this paper, a screening and identification technique is presented for sorting out variants with high photosynthetic rates adapted to a wide range of light intensity from F4 segregating populations which came from crosses between light-sensitive and insensitive rice varieties.
耐阴
shade tolerance
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