板栗不同类型枝条花期和幼果期光合特性研究  

Study on photosynthetic physiology characteristics of Chinese chestnut in different types of shoots during flowering and young fruit period

作　　者：郭素娟[1] 谢鹏[1] 

机构地区：[1]北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083

出　　处：《东北农业大学学报》2013年第10期76-81,共6页Journal of Northeast Agricultural University

基　　金：国家林业公益性行业科研专项重大项目(201204401);国家"十二五"科技支撑专题(2013BAD14B0402)

摘　　要：以板栗‘燕山早丰’(C.mollissima'Yanshanzaofeng')为试验材料,对其花期和幼果期不同类型枝条叶片叶绿素含量、光合参数、叶绿素荧光特性等指标的变化规律进行研究。结果表明,板栗不同类型枝条叶片叶绿素含量均存在差异,结果枝叶片叶绿素总量比非结果枝高1.08%;幼果期叶片叶绿素总量高于花期,但花期叶绿素a/b却高于幼果期;不同类型枝条在花期净光合速率(Pn)的顺序为结果枝>营养枝>雄花枝,气孔导度(Gs)与蒸腾速率(Tr)的顺序为结果枝>雄花枝>营养枝,胞间CO2浓度(Ci)的顺序为雄花枝>营养枝>结果枝,而在幼果期光合参数指标均为结果枝最高,分别为Pn(5.62μmol·m-2·s-1),G(s0.152mol·m-2·s-1),C(i234.33mol·mol-1),T(r2.97mol·m-2·s-1)和WUE(1.89g·dm-2·h-1);不同类型枝条在相同时期叶绿素荧光参数无显著差异,结果枝和营养枝有效光化学量子产量(Fv'/Fm')、PSⅡ非光化学淬灭系数(NPQ)、非光化学猝灭(qN)在幼果期均小于花期,PSⅡ光化学淬灭系数(qP)值高于花期。This research explored the interactions of the leaf chlorophyll contents, photosynthetic parameters and chlorophyll fluorescence characteristics of Chinese chestnut ＇Yanshanzaofeng＇ （C. molli- ssima ＇Yanshanzaofeng＇） in different types of shoots during flowering and young fruit periods. The results indicated that chlorophyll contents in leaves on different shoots were different, the fruit-bearing shoot was higher than non-fruiting shoots; young fruit period was 1.08% higher than flowering period, but the content of chlorophyll a/b was lower than flowering period. The values of Pn were fruit-bearing shoots〉vegetative shoots〉staminate shoots, Gs and Tr were fruit-bearing shoots〉staminate shoots〉 vegetative shoots, and Ci were staminate shoots〉fruit-bearing shoots〉vegetative shoots in different type of shoots during flowering period. During young fruit period the photosynthetic parameters was higher in fruit-bearing shoots Pn （5.62 pmol. m-2. s-1）, Gs （0.152 mol. m2. s-1）, Ci （234.33 mol. mol-1）, Tr （2.97 mol-m2. s-1） and WUE （1.89 g. dm-2. h＂）; Chlorophyll fluorescence parameters had no significantdifference in different types of shoots at the same period, the Fv＇/Fm＇, qN and NPQ during young fruit period were lower than those of the flowering period, and the qP was just reversed.

关 键 词：板栗 叶绿素含量 光合特性 叶绿素荧光特性 

分 类 号：S664.2[农业科学—果树学]