| 徐零零,徐艳玲,高建有,张帆靖,王发明,查满荣,刘世彪.淹水胁迫对对萼猕猴桃光合特性的影响[J].中国南方果树,2026,55(2): |
| 淹水胁迫对对萼猕猴桃光合特性的影响 |
| Effects of waterlogging stress on the photosynthetic properties of Actinidia valvata |
| 投稿时间：2024-11-22 修订日期：2025-03-03 |
| DOI：10.13938/j.issn.1007-1431.20240570 |
| 中文关键词: 对萼猕猴桃 淹水胁迫 叶绿素含量 叶绿素荧光参数 光合特性 |
| 英文关键词:Actinidia valvata waterlogging stress chlorophyll content chlorophyll fluorescence parameters photosynthetic characteristics |
| 基金项目:国家自然科学基金(32160084),湖南省自然科学基金(2023JJ30488),湖南省教育厅科学研究项目(23B0502) |
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| 中文摘要: |
| 对萼猕猴桃(Actinidia valvata)耐涝性强,被广泛作为猕猴桃耐涝砧木应用。为了解其耐涝生理机制,本文以对萼猕猴桃‘水秀’品种一年生实生苗为实验材料,以中华猕猴桃‘红阳’品种一年生实生苗为对照,采用盆栽淹水实验,测定了其叶绿素相对含量、叶绿素荧光参数及光合作用指标的变化,分析淹水胁迫对其光合特性的影响。结果显示,连续淹水10 d对萼猕猴桃‘水秀’表型没有出现明显受害症状,SPAD值与正常栽培对照组相比无显著变化。叶绿素荧光参数在淹水初期虽有波动,但能迅速调整至正常水平并与对照组基本持平。淹水胁迫下净光合速率与气孔导度显著下降,仍能维持在对照组的约60%水平。中华猕猴桃‘红阳’则随着淹水胁迫的持续,植株受害严重直至死亡,其间叶绿素含量降低,叶绿素荧光参数和光合作用指标在后期与对照组显著偏离,净光合速率趋近于0。淹水胁迫对对萼猕猴桃光合特性的影响较轻,可能与其通过气孔限制来调控光合作用有关。 |
| 英文摘要: |
| Actinidia valvata is widely used as rootstock with its strong ability of waterlogging tolerance. In order to understand the waterlogging tolerance mechanism of this species, the annual seedlings of Actinidia valvata "ShuiXiu" were employed as the treatment materials and those of A. chinensis "HongYang" were used as control species in this paper. Based on potting flooding experiment, the changes of relative content of chlorophyll (SPAD), chlorophyll fluorescence parameters and index of photosynthesis were determined, and the effects of water stress on the photosynthetic parameters of the above two species were analyzed. The results showed that after 10 days of waterlogging, no obvious harmful phenotype symptoms were expressed in A. valvata "ShuiXiu", less changes were occurred in the values of SPAD compared with the control plants in normal cultivation. The chlorophyll fluorescence parameters fluctuated in the early stages during waterloggng treatment, but adjusted quickly to normal level and essentially equal to the control. The descent in net photosynthetic rate and stomatal conductance under waterlogging stress was significant, which still maintained about 60% of the control plants, bothly. However, the control species of A. chinensis "HongYang" experienced serious damage and even to death in 10 days of waterlogging stress, during which the SPAD value decreased, the chlorophyll fluorescence parameters and photosynthetic index deviated significantly when compared with the control plants in normal cultivation, and the net photosynthetic rate approached to 0 at the last day of treatment. Waterlogging stress expressed less effect on photosynthesis in A. valvata may revolve in its regulation the photosynthetic properties by stomatal limitation. |
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