Effect of two irrigation rates on yield, incidence of blossom-end rot, mineral content and free amino acid levels in tomato cultivated under drip irrigation using saline water
Effect of two irrigation rates on yield, incidence of blossom-end rot, mineral content and free amino acid levels in tomato cultivated under drip irrigation using saline water
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DOI：
10.1080/14620316.1999.11511132
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发表时间：
1999-07-01
影响因子：
1.9
通讯作者：
García, AL
中科院分区：
文献类型：
--
作者：
Franco, JA;Pérez-Saura, PJ;García, AL
一项实验研究了两种灌溉率（其中一种反映了很大程度的水分胁迫）对番茄矿物质含量、游离氨基酸水平和花端腐烂病（BER）发生率的影响。'Durinta'）。这些植物在露天种植，使用井中的盐水进行滴灌（平均ECW 5.2 dS m（-1））。在灌溉量较高的处理中，单株产量较高，受BER影响的果实较少。第一和第五桁架的果实。和上面的叶子，分析它们的常量营养素、微量营养素和游离氨基酸含量。叶片和果实中大量营养元素含量几乎没有变化，只有果实中的N含量在水分胁迫下受到显著影响，且含量较高。成熟果实花柱部Ca含量与BER发病率相关，但不受灌溉水平的影响。在微量元素方面，只有Fe（第一桁架叶片和果实）、Cu（第一桁架叶片）、Zn（第一桁架叶片和果实、第五桁架叶片）和Mn（第一桁架叶片）含量差异显著，两种灌溉处理叶片游离氨基酸总量相似。而果实中游离氨基酸总量，尤其是第一桁架的含量，则以灌水量少的处理较高。氨基酸：天冬氨酸（仅来自第一桁架）、谷氨酸、脯氨酸和丙氨酸在灌溉较少的植物的果实中具有高浓度，而γ-氨基丁酸和苯丙氨酸（仅来自第五桁架）在灌溉较多的植物的果实中浓度较高。
An experiment investigated the effects of two rates of irrigation, one of which reflected a substantial degree of water stress, on the mineral content, free amino acid levels and incidence of blossom-end rot (BER) in tomato (Lycopersicon esculentum Mill. 'Durinta'). The plants were grown in the open with drip irrigation using saline water from a well (mean ECW 5.2 dS m(-1)). The yield per plant was higher and fewer fruit were affected by BER in the treatment involving the higher level of irrigation. The fruit of the first and fifth truss. and the leaves immediately above, were analysed for their macronutrient, micronutrient and free amino acid content. The macronutrient leaf and fruit content hardly showed any difference, only the N concentration in fruit being significantly affected in the water stressed plants, in which the levels were higher. The Ca concentration in the stylar portion of mature fruit, which is related with the incidence of BER, was not significantly affected by the level of irrigation. As regards micronutrients, only the Fe (in leaf and fruit of the first truss), Cu (in leaf of the first truss), Zn (in leaf and fruit of the first truss, and leaf of the fifth truss) and Mn (in leaf of the first truss) concentrations differed significantly, The total free amino acid leaf content was similar in both irrigation treatments. However, the total free amino acid content of fruit, significantly those of the first truss, was higher in the less irrigated treatment. The amino acids: aspartic acid (only from the first truss), glutamic acid, proline and alanine had high concentrations in the fruit of the less irrigated plants, while the gamma-aminobutyric acid and phenylalanine (only from the fifth truss) concentrations were higher in fruit of the more irrigated plants.