| 摘要: |
| 【目的】本研究旨在探讨樱桃番茄苗期对淹水胁迫的响应机制，为热带地区反季节露地樱桃番茄的抗涝渍栽培提供参考。【方法】试验以5个不同的樱桃番茄品种作为材料，采用盆栽方式，以正常水分管理作为对照（CK），测定不同淹水天数后樱桃番茄苗期地上部和地下部的形态特征指标，以及叶片叶绿素荧光参数等指标，分析淹水胁迫对樱桃番茄苗期形态特征及叶绿素荧光参数的影响。【结果】淹水胁迫显著降低了樱桃番茄的株高、茎粗、叶面积、叶片数和叶片SPAD值，但对叶片厚度没有显著影响。淹水处理对樱桃番茄根系直径没有显著影响，但显著增加了红妃6号和台湾赞美的根系体积；淹水处理显著增加了红妃6号的根长与根系表面积，但显著降低了千禧的根长和根表面积。淹水后，樱桃番茄叶片初始荧光（Fo）和非光化学淬灭系数（NPQ）增加；最大光化学效率（Fv/Fm）、表观电子传递速率（ETR）和光化学淬灭系数（qP）淹水处理后则显著降低，但红妃6号淹水处理后Fo、Fv/Fm、ETR和qP与CK相比没有显著差异。【结论】淹水胁迫严重影响了樱桃番茄的生长发育以及叶片叶绿素荧光，但不同品种间存在差异；红妃6号对淹水最不敏感，而千禧受淹水影响最大。 |
| 关键词: 樱桃番茄； 淹水胁迫； 形态特征； 荧光参数 |
| DOI：10.13522/j.cnki.ggps.20190168 |
| 分类号: |
| 基金项目: |
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| Effects of Waterlogging on Morphology and Chlorophyll Fluorescence Characteristics of Cherry Tomato at Seedling Stage |
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TONG Mengying， HUANG Jiaquan， LI Changjiang
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Hainan Key Laboratory for Sustainable Utilization of Tropical Bioresource, College of Tropical Crops, Hainan University, Haikou 570228, China
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| Abstract: |
| 【Objective】 The aim of this study was to investigate the responses of cherry tomato to waterlogging at seedling stage, and to provide reference for waterlogging resistance cultivation of off-season cherry tomato in the tropical area. 【Method】Five different varieties of cherry tomatoes were used as materials in pot culture experiment, with soil waterlogging treatment and normal moisture treatment as the control (CK). The morphological characteristics indexes of shoot and root and chlorophyll fluorescence parameters in leaves of cherry tomato were measured in different days of waterlogging. And the effects of waterlogging on morphological characteristics and chlorophyll fluorescence parameters at seedling stage of cherry tomato were analyzed. 【Result】 Results showed that waterlogging significantly decreased the plant height, stem diameter, leaf area, leaf number and SPAD value of cherry tomato, but had no significant effect on leaf thickness. The root diameter of cherry tomato had no significant affects, but the root volume was significantly increased in HongFei 6 and TaiwanZanMei during waterlogging. Compared with CK, the root length and root surface area of HongFei 6 increased significantly, while that of QianXi decreased significantly during waterlogging. Additionally, waterlogging increased the initial fluorescence (Fo) and non-photochemical quenching coefficient (NPQ), and significantly decreased the maximum photochemical efficiency (Fv/Fm), apparent electron transfer rate (ETR) and photochemical quenching coefficient (qP) of cherry tomato leaves, besides HongFei 6. 【Conclusion】The results above indicated that during waterlogging the growth and development and chlorophyll fluorescence in leaves of cherry tomato were seriously affected, but there had different effects among five different varieties . Among five varieties of cherry tomatoes, the strongest waterlogging resistance was HongFei 6, while the weakest waterlogging resistance was QianXi. |
| Key words: Cherry tomato; flooding stress; morphological characteristics; fluorescence parameters |
