| 张红娜1，苏钻贤2，陈厚彬2.荔枝花芽分化对其源叶光合作用及碳氮物质代谢的影响[J].广东农业科学,2016,43(11):50-55 |
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荔枝花芽分化对其源叶光合作用及碳氮物质代谢的影响 |
| Effects of flower bud differentiation on photosynthesis and carbon，nitrogen metabolism in Litchi（ Litchi chinensis Sonn.） |
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| DOI：10.16768/j.issn.1004-874X.2016.11.008 |
| 中文关键词: 荔枝 花芽分化 光合作用 碳氮物质 |
| 英文关键词: Litchi（ Litchi chinensis Sonn.） flower bud differentiation photosynthesis carbon and nitrogen |
| 基金项目:国家荔枝龙眼现代农业产业技术体系建设专项资金（CARS-33）；广东省现代农业（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: |
| 为研究荔枝花芽分化对其源叶光合及同化产物合成的影响，以妃子笑荔枝为材料，比较分析同
一生境下成花枝条与未成花枝条叶片的光合参数和碳氮物质的变化。结果表明，荔枝成花枝条叶片的净光
合速率（2.39 μmol/m2·s）极显著地高于未成花枝条的（1.60 μmol/m2·s）；同时，成花枝条的气孔导度、
胞间CO2 浓度、蒸腾速率和水分利用率均高于未成花枝条。荔枝花芽分化阶段，成花枝条叶片中的可溶性
总糖含量和C/N 比值明显高于未成花枝条，而总氮含量则是未成花枝条明显高于成花枝条。妃子笑荔枝花
芽分化期间，其成花枝条潜在的光合能力要高于无花枝条；而源叶同化产物合成能力增加，则有助于为花
芽发育提供充足的物质基础，以保证荔枝成花的顺利进行。 |
| 英文摘要: |
| To investigate the effects of flower bud differentiation on photosynthesis and assimilation products，
we analyzed the variation in the concentrations of leaf photosynthesis，carbon and nitrogen metabolism of‘ Feizixiao’
litchi trees. The results showed that Photosynthesis（ Pn，2.39 μmol/m2·s） was significantly higher in flowering
shoot than that in vegetative shoot（ 1.60 μmol/m2·s）. In addition，it was found that the stomatal conductance
（Gs），internal CO2 concentration（ Ci），transpiration rate（ Tr），and water use efficiency（ WUE） of flowering
shoot were higher than those of vegetative shoot. During the flower bud differentiation stage，the contents of soluble
sugars and C/N ratio of flowering shoot were significantly higher than those of vegetative shoot，whereas total nitrogen
had a contrary tendency. The results suggested that there was higher potential photosynthetic capacity in flowering
shoot than that in vegetative shoot. Litchi flowering was able to promote assimilation production，more sugar gave out
a rich basis for the development of flower buds and to keep floral formation moving along smoothly. |
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