| 张红娜1,2，苏钻贤2，陈厚彬2.荔枝成花期诱导性低温对其叶片光合特性的影响[J].广东农业科学,2016,43(10):59-63 |
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荔枝成花期诱导性低温对其叶片光合特性的影响 |
| Effects of low temperature on photosynthetic and chlorophyll fluorescence parameters of litchi leaves during flowering induction period |
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| DOI：10.16768/j.issn.1004-874X.2016.10.011 |
| 中文关键词: 荔枝 低温 光合特性 叶绿素荧光 成花诱导 |
| 英文关键词: litchi（ Litchi chinensis Sonn.） low temperature photosynthetic parameter chlorophyll fluorescence floral induction |
| 基金项目:国家荔枝龙眼现代农业产业技术体系建设专项（CARS-33）；广东省省级现代农业（重要热带作物）产业技术研发中心建设项目 |
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| 中文摘要: |
| 以盆栽荔枝苗为试验材料，研究荔枝成花期诱导性低温对其叶片光合特性和叶绿素荧光参数
的影响。结果表明，在低温处理下，糯米糍和妃子笑两种荔枝叶片的Pn、Tr和Gs随处理时间的延长呈下降
趋势，而Ci则呈上升趋势，说明低温处理下荔枝光合效率的下降可能来源于非气孔因素抑制。低温处理后
糯米糍品种的Fo有所增加，Fm和Fv变化不大，Fv/Fm稍有下降；而妃子笑品种的Fo和Fv/Fm无明显变
化，Fm和Fv呈下降趋势。两种荔枝的ФPSⅡ均呈下降趋势，品种间差异不显著。说明低温对两个荔枝品
种的光化学效率都有一定的影响，是造成其叶片光合速率下降的主要原因。 |
| 英文摘要: |
| Potted litchi trees were used to investigate the influences of low temperature on its photosynthetic and
chlorophyll fluorescence parameters during flowering induction period. The results showed that net photosynthetic
rate（Pn），transpiration rate（Tr）and stomatal conductance（Gs）decreased over time under low temperature
induction，while intercellular CO2（Ci）concentration increased. The decreasing of Pn by low temperature treatment
was mostly caused by non-stomatal limitation. The results also showed that after the low temperature treatment，Fo
of Nuomici ascended slightly，Fm and Fv had no obvious changes，Fv/Fm descended slightly，while Fo and Fv/Fm
of Feizixiao unchanged significantly，their Fm and Fv descended over time. ФPS Ⅱ of both species were on the
decline，but there was no obvious difference between varieties. The results suggested that low temperature had certain
influence on the photochemistry efficiency of litchi，which was the main reason for the decreasing of Pn. |
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