摘要
【目的】通过对比5个西梅品种光合速率的光响应(Pn-PFD)和CO_2响应(Pn-CO_2)曲线特征值和叶片部分特性,为西梅的引种和优质高产栽培管理措施提供理论依据。【方法】使用Li-6400便携式光合测定系统、cI-203手持式激光叶面积仪和电子游标卡尺,对5个西梅品种的叶片进行测定,探讨5个西梅品种光合特性和叶片特征的共性和个性。【结果】比较5个西梅品种,兰密的光饱和点(LSP)、最大光合速率(Pn)和表观量子效率(4QY)均最高,而其光补偿点(LCP)最低,值分别为1 124、19.503和0.0519、21μmol/(m^2·s);大玫瑰的LSP、最大Pn和表观量子效率均最低。Pn-C02响应曲线特征值相比,5个品种中大玫瑰的C02饱和点(CSP)和补偿点(CCP)均明显高于其他品种,但其RuBP羧化效率(CE)最低;法兰西品种的CSt值和最大Pn均最低,而其CCP值最高。5个西梅品种中来客和大玫瑰的叶片较大,而其叶片总叶绿素显著低于其他品种;优萨的叶比重最大,法兰西和来客的比叶重最小。【结论】5个西梅品种中兰密和优萨的光能利用率较高,其中兰密在光强度较强的环境中能够表现出最佳光合生产力,而优萨适合于适当的密植高产优质栽培模式。
[ Objective ] This project aims to provide a theoretical basis tot the introduction aria nigh quality - yield cultivation management of five plum cultivars by comparing their photosynthetic response to light （Pn- PFD ） and to CO2 and some characteristics of leaves. [ Method ] By using Li -6400 portable photosynthesis system, CI - 203 hand - held laser leaf area meter and electronic vernier caliper, some indexes of five plum cuhivars were measured and the generality and individuality of photosynthetic characteristics and leaf characteristics of those were discussed. [ Result ] When the five plum cultivars were compared, Lanmi expressed highest light saturation point （LSP）, the maximum photosynthetic rate （Pn） and apparent quantum yield （AQY）, and its light compensation point （LCP） was the lowest among those five cuhivars. Their values were 1 124,19. 503, 0. 051 9, 21 μmol/（m2 · s） , respectively; but the LSP, Pnand AQY of Great Rosa were the lowest. To compare each other on characteristic value of Pn - CO2 response curve of the five plum cultivars, the CO2 saturation point （CSP） and compensation point （CCP） of Great Rosa were remarkable higher than those of other cultivars, but the lowest RuBP carboxylation efficiency （CE） appeared; the CSP value and maximum Pn of French were the lowest of the five plum cultivars, but its CCP value was the highest. Record and Great Rosa had a significantly larger leaves and lower total chlorophyll content of leaves compared with other five plum cultivars; among these five plum cultivars, Usa has the largest specific leaf weight, Flanxi and Record were the lowest. [ Conclusion ] Comprehensive analysis showed that Lanmi and Usa have the higher light use efficiency compared with other three plum cultivars, among which Lanmi showed the best photosynthetic productivity if it grows under highlight area; but Usa is a more suitable cultivar for close planting, high -yield and high -quality cultivation pattern.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2012年第12期2189-2195,共7页
Xinjiang Agricultural Sciences
基金
新疆维吾尔自治区财政林业科技专项资金项目(2010年)
关键词
西梅
光响应
CO2响应
叶片特性
plum
light response
CO2 response
leaf characteristics
