%0 Journal Article
%T Acclimation to Light Environment Changes of a Tropical Rainforest Fern,Pteris ensiformis<br>热带雨林剑叶凤尾蕨(Pteris ensiformis)对光强变化的适应
%A CAI Zhi-Quan
%A CAO Kun-Fang
%A LI Bao-Gui
%A <br>蔡志全
%A 曹坤芳
%A 李宝贵
%J 植物科学学报
%D 2002
%I 
%X Investigations of field showed that Pteris ensiformis has the ability to acclimate to different light levels. This study investigated the ability of individuals of Pteris ensiformis to acclimate to low and high irradiance. Plants were cultivated in understory and gap of tropical primary rainforest for about 40 days. Individuals growing in understory indicated more number of leaves, bigger canopy width, higher chlorophyll contents and higher photosynthetic rates than that of plants growing in forest gap. Plants growing in understory also exhibited a greater efficiency in the photochemical utilization of absorbed light energy and lower ability to dissipate excess energy nonphotochemically, relative to the plants growing in forest gap. However, maximum photosynthetic rates were similar in both sets of plants, reflecting the higher efficiency of energy conversation in the understory growning plants and an apparent saturation of photosynthetic capacity in the gap growing plants. The latter may have resulted from the injury of the photosynthetic apparatus in addition to an increase in nonphotochemical dissipation of excess light energy. The higher capacity for harmless thermal dissipation of excess light energy should be beneficial in plants growing in exposed locations and subject to drought and nutrient stresses. Thus, the results expanded those plasticity in adjusting the photosynthetic apparatus to various light levels constitutes a valuable adaptation to growing in different light environments in the tropical rainforest.
%K Pteris ensiformis
%K Tropical primary rainforest
%K The light environment of understory and gap
%K Photosynthetic characteristics
%K Nonphotochemical dissipation<br>热带原始雨林
%K 林下
%K 林窗
%K 光环境
%K 光合特性
%K 非辐射耗散
%K 阴性植物
%K 光强变化
%K 热带雨林
%K 剑叶凤尾蕨
%K 适应
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=9973DE552EA54506F7AABD4780345ED2&aid=85B8FDC59D4A1CE8&yid=C3ACC247184A22C1&vid=A04140E723CB732E&iid=E158A972A605785F&sid=E2B9962CCD971A0D&eid=EBD6B792C9111B87&journal_id=1000-470X&journal_name=武汉植物学研究&referenced_num=5&reference_num=18