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茶叶科学 ›› 2015, Vol. 35 ›› Issue (5): 443-448.doi: 10.13305/j.cnki.jts.2015.05.006

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茶树新品种桂绿1号光合特性初步研究

莫凌, 姚月锋*, 白坤栋, 顾大形, 曾丹娟, 黄玉清*   

  1. 广西喀斯特植物保育与恢复生态学重点实验室 广西壮族自治区中国科学院广西植物研究所,广西 桂林 541006
  • 收稿日期:2014-11-18 修回日期:2015-03-04 出版日期:2015-10-15 发布日期:2019-08-26
  • 通讯作者: *
  • 作者简介:莫凌,女,副研究员,主要从事植物生理生态学研究,E-mail:ml@gxib.cn。
  • 基金资助:
    国家科技支撑计划项目(2012BAC16B01/02)、广西科技攻关计划项目(1298006-2)、广西科学院基本科研业务费(13YJ22ZWS22)、广西植物研究所基本业务费(13010、12001)资助

A Preliminary Study on Photosynthetic Characteristics for New Tea Cultivar Guilyu-I

MO Ling, YAO Yuefeng*, BAI Kundong, GU Daxing, ZENG Danjuan, HUANG Yuqing*   

  1. Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region and Chinese Academy of Sciences, Guilin 541006, China
  • Received:2014-11-18 Revised:2015-03-04 Online:2015-10-15 Published:2019-08-26

摘要: 采用Li-6400便携式光合测定系统对茶树新品种桂绿1号的光合-光响应曲线和光合日变化进行了测定分析。结果表明,在夏季晴天条件下,桂绿1号净光合速率(Pn)日变化呈单峰曲线,峰值出现在11:00,约为9.36βμmol·m-2·s-1;蒸腾速率(Tr)的日变化也为单峰曲线,但其最大值出现在15:00,约为4.06βmmol·m-2·s-1。该品种的光饱和点与光补偿点分别为354.60βμmol·m-2·s-1和7.13βμmol·m-2·s-1,表观量子效率(Φ)为0.088βmol·mol-1。逐步多元回归分析表明,光合有效辐射和空气相对湿度是直接影响桂绿1号茶树净光合速率日变化的主要因子。该研究为桂绿1号的引种、速生丰产和制定栽培管理措施提供理论依据。

关键词: 茶树, 桂绿1号, 净光合速率, 光响应曲线, 光合日变化

Abstract: The Pn-PAR response curve and diurnal variation of photosynthesis of a new tea cultivar Guilyu-I were measured and analyzed with the Li-6400 portable photosythesis measuring system. The results showed that the curve of diurnal variation of net photosynthetic rate (Pn) could be described as unimodal curve, and the peak value was 9.36βμmol·m-2·s-1, which occurred at 11:00AM. The curve of diurnal variation of transpiration rate was also showed in a single peak curve, but the peak value appeared at 15:00, which was 4.06βmmol·m-2·s-1. The stepwise multi-regression analysis showed that the photosynthetically active radiation and air relative humidity were the main direct factors which affected the diurnal variation of Pn. The light compensation point and light saturation point in cultivar Guilyu-I were 7.13 and 354.60βμmol·m-2·s-1 respectively. And the apparent quantum yield was 0.088 mol·mol-1. This study provided a theoretical basis for fast-growing and high-yield cultivation, and for the establishment of cultivation management strategy of the introduction of Guilyu-I cultivar.

Key words: tea plant, Guilyu-I, net photosynthetic rate, light response curve, diurnal variation of photosynthesis

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