半干旱区酸性百香果品种对盐胁迫的耐受性

G. S. Lima, W. B. B. Souza, F. J. S. Paiva, L. A. A. Soares, R. A. F. Torres, S. T. A. Silva, H. Gheyi, K. P. Lopes
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引用次数: 0

摘要

鉴于巴西半干旱地区低盐度水资源的数量短缺,有必要使用高浓度的盐水。因此,鉴定耐盐作物品种是扩大灌溉农业的另一种选择。本研究的目的是评价百香果品种的耐受性与灌溉水电导率的关系。试验采用5 × 3因子随机分组设计,采用灌溉水电导率5个值ECw(0.3、1.1、1.9、2.7和3.5 dS m-1)和3个酸味百香果品种(BRS GA1、BRS SC1和SCS437)组合处理,共3个重复。在移植后153天,0.3 dS m-1的水电导率降低了百香果植株叶片的相对含水量、气体交换和果实数量,增加了电解质泄漏。百香果品种BRS GA1、BRS SC1和SCS437为敏感品种,水的阈值电导率分别为0.3、1.0和0.3 dS m-1。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tolerance of sour passion fruit cultivars to salt stress in a semi-arid region
ABSTRACT Given the quantitative scarcity of low-salinity water resources in the Brazilian semi-arid region, it is necessary to use water with a high concentration of salts. Thus, identifying salt-stress tolerant cultivars of crops is an alternative for expanding irrigated agriculture. The objective of this study was to evaluate the tolerance of passion fruit cultivars as a function of irrigation water electrical conductivity. The experimental design was randomized blocks, in a 5 × 3 factorial scheme, whose treatments consisted of the combination of five values of electrical conductivity of irrigation water - ECw (0.3, 1.1, 1.9, 2.7, and 3.5 dS m-1) and three sour passion fruit cultivars (BRS GA1, BRS SC1, and SCS437, with three replicates. Electrical conductivity of water from 0.3 dS m-1 reduces the relative water content, gas exchange, and the number of fruits and increased electrolyte leakage in the leaf blade of passion fruit plants, at 153 days after transplantation. The passion fruit cultivars BRS GA1, BRS SC1, and SCS437 were classified as sensitive, with threshold electrical conductivity of water of 0.3, 1.0, and 0.3 dS m-1, respectively.
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