浙江大学学报（理学版）2011，Vol.38Issue(6)：682-688,7.DOI:10.3785/j.issn.1008-9497.2011.06.015
濒危植物夏蜡梅光合生理生态特性
Photosynthesis traits of the endangered plant species Sinocalycanthus chinensis
摘要
Abstract
Three light conditions, such as full light (CK), 37% full light (37% RI) and 10% full light (10% RI) were conducted using different shading. The photosynthesis traits and the fluorescence parameters of the endangered plant species Sinocalycanthus chinensis in three different light conditions were determined on the mid July, 2007. The diurnal variations of photosynthetic rate of S. Chinensis in three different light conditions are all typical curves with double peaks. The midday depression under CK and 37 % RI light conditions are clear. The maximal net photo-synthetic rate of S. Chinensis ranked in the order: 37%RI>CK>10%RI. The daily net photosynthetic rate of S. Chinensis ranked in the order: 37%RI>10%RI>CK. The diurnal variation of the inflorescence parameters indicated that the light inhibition is not clear under 10% RI light condition. The light inhibition in the middle day is clear under 37% RI light condition but the photosynthetic organs can be restored. The light inhibition can be detected all the day in full light and the photosynthetic organs can not be restored. The diurnal variations of photosynthetic rate of S. Chinensis and main accompany plant species in the canopy and understory habitats in natural community were determined in July, October 2006 and April 2007. In July, the diurnal variation of photosynthetic rate of S. Chinensis in the canopy is a curve with two peaks with clear midday depression while that in the understory habitat is a curve with single peak. In April and October, that of S. Chinensis and the accompany plant species are all curves with single peak. The daily mean net photosynthetic rate of S. Chinensis in three seasons are lower than those of the accompany plant species, which might be the main reason why S. Chinensis is at a disadvantage status in the interspecific competition in the community.关键词
濒危植物/夏蜡梅/光合生理参数/叶绿素荧光参数/季节动态Key words
endangered plant/ Sinocalycanthus chinensis/ photosyntheitc traits/ fluorescence parameters/ seasonal dynamics分类
农业科技引用本文复制引用
金则新,李钧敏,马金娥..濒危植物夏蜡梅光合生理生态特性[J].浙江大学学报（理学版）,2011,38(6):682-688,7.基金项目
国家自然科学基金资助项目(30870392) （30870392）
浙江省自然科学基金资助项目(Y3080460). （Y3080460）
