3个油橄榄品种光合特性与同化物分配规律
Analysis of Photosynthetic Characteristics and Assimilates Distribution of Three Olea europaea Varieties
王瑞文 1黄颖 2郑京津 2姜德志 2黄发新3
作者信息
- 1. 经济林木种质改良与资源综合利用湖北省重点实验室/大别山特色资源开发湖北省协同创新中心/黄冈师范学院,湖北黄冈 438000;湖北省林业科学研究院,武汉 430075
- 2. 湖北省林业科学研究院,武汉 430075
- 3. 湖北省国有林场工作站,武汉 430070
- 折叠
摘要
为研究油橄榄光合特性及同化物分配规律,使用LI-6400XT光合测定系统及13C同位素标记分别测定3个油橄榄品种的光合指标和同化物分配.结果表明,3个品种光合日变化均为典型的双峰型,存在"午休"现象.灰色关联度分析表明,影响净光合速率的主要因子是气孔导度和大气CO2浓度.3个油橄榄品种的光饱和点、光补充点均高于一般阳性植物,为强阳性树种.不同品种间光合及CO2响应曲线特征参数存在差异,'佛奥'、'鄂植8号'光合能力较强,对光和CO2的利用范围及利用率高.用13C同位素法标记72 h后,光合同化物主要集中在叶片,分配率为39.52％～49.92％;种仁的光合同化物含量最低,分配率仅为6.67％～8.18％.
Abstract
The aim was to study the photosynthetic characteristics and assimilates distribution of Olea europaea.photosynthetic indexes and assimilates were measured with Li-6400XT photosynthetic instrument and carbon-13 isotope labeling.The results showed that,the diurnal variation of photosynthesis of the three varieties presented a bimodal curve and an obvious'midday depression'phenomenon.The main factors affecting net photosynthetic rate were stomatal conductivity and air CO2 concentration.The three O.europaea varieties were strong light demander.The light compensation point and light saturation point of the three O.europaea varieties were higher than general sun species.There were differences in photosynthetic parameters and CO2 response curves parameters among the three varieties.'Foao'and'Ezhi 8'had a strong photosynthetic capability,a wide utilization range and a high utilization rate of light and CO2.The photosynthetic assimilates mainly concentrated in leaves and the distribution rate was 39.52％-49.92％after the 72 hours of 13C isotope labeling.The photosynthetic assimilates concentrated in seeds was the least and the distribution rate was only 6.67％-8.18％.
关键词
油橄榄/光合日变化/光响应曲线参数/CO2响应曲线参数/光合同化物分配Key words
Olea europaea/diurnal variation of photosynthesis/relevant parameters of photosynthetic light response curve/relevant parameters of photosynthetic CO2 response curve/photoassimilate partitioning引用本文复制引用
基金项目
经济林木种质改良与资源综合利用湖北省重点实验室项目(202019704)
中央财政林业科技推广项目(鄂[2023]TG14号)
出版年
2024
国家科技期刊平台
NSTL
万方数据