Environmental Effects on Dynamics of Fruit Growth and Photoassimilate Translocation in Tomato Plants (3)

Environmental Effects on Dynamics of Fruit Growth and Photoassimilate Translocation in Tomato Plants (3)
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环境对番茄植株果实生长动态和光同化物易位的影响 (3)

DOI:
10.2525/ecb1963.39.53
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发表时间:
2001
期刊:
Environment control in biology
影响因子:
--
通讯作者:
Toshihiko Eguchi
Toshihiko Eguchi
中科院分区:
--
文献类型:
--
作者:
T. Araki;M. Kitano;K. Okano;S. Yoshida;Toshihiko Eguchi

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盐胁迫对番茄果实膨大生长动态及水分平衡的影响通过测定韧皮部汁液和木质部汁液通过花梗的流通量等水分平衡成分进行分析。在水培营养液中加入氯化钠诱导盐胁迫。通过花梗进入果实的汁液主要由韧皮部汁液提供,受盐胁迫的影响较小。另一方面,盐胁迫下木质部汁液通量下降了34%。在盐胁迫下,韧皮部汁液和木质部汁液对果实膨大生长的贡献率为25%,韧皮部汁液对果实膨大生长的贡献率较高,其中韧皮部汁液占果实总数的83%,木质部汁液对果实膨大的贡献率仅为17%。因此,分别评估韧皮部汁液和木质部汁液进入果实的通量可以定量地表明,盐胁迫导致较小的番茄果实含糖量较高,花端腐烂发生率较高。
Effects of salt stress on dynamics of expansive growth and water balance in a growing fruit of tomato (Lycopersicon esculentum Mill.) were analyzed by evaluating components of fruit water balance such as phloem sap and xylem sap fluxes through the pedicel. Salt stress was induced by adding NaCl to the hydroponic nutrient solution. The major part of sap flux into the fruit through the pedicel was brought by phloem sap flux, which was scarcely affected by the salt stress. On the other hand, 34% depression was found in xylem sap flux under the salt stress. These responses of phloem sap and xylem sap fluxes resulted in 25% depression in fruit expansive growth and the higher contribution of phloem sap flux under salt stress, where 83% of sap accumulated into the fruit was phloem sap and the contribution of xylem sap was only 17%. Thus, the separate evaluations of phloem sap and xylem sap fluxes into the fruit can suggest quantitatively that salt stress results in smaller tomato fruits with higher sugar concentrations and higher incidence of blossom-end rot.
Araki,T.:“通过番茄花梗的光同化物通量的评估。”
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Eguchi, H.:“利用自然光强度作为反馈信号,在气温变量控制下黄瓜植物(Cucumis sativus L.)的生长。”
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Araki,T.:“番茄果实的呼吸、液流、水分平衡和膨胀生长。”
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