J. S. Nóbrega, T. I. Silva, Ronimeire Torres da Silva, Maria de Fátima de Queiroz Lopes, F. Figueiredo, R. Bruno
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引用次数: 0
摘要
盐胁迫是制约植物发育的重要因素之一,萌发、生长和初生阶段对盐胁迫最为敏感。在巴西俗称“mulungu”的Erythrina velutina是Caatinga生物群系的一种原生物种,生长在富含盐分的土壤条件下。盐碱对其种子质量造成的损害以及减轻这种影响的技术的使用鲜为人知。因此,本研究旨在评价水杨酸作为盐胁迫缓解剂对木龙果种子生理品质的影响。对来自巴西两个州的两个种子批次(L1: Mossoró,里约热内卢Grande do Norte, L2: Pentencostes, cerar )的质量进行了评估。采用2(水杨酸(SA) -蒸馏水和1.0 mM SA浸泡种子)× 4(灌溉水电导率- ECw - 0.0、3.0、6.0和9.0 dS - m-1)因子设计,4个重复,每个重复50粒种子。盐胁迫降低了木龙骨种子和幼苗的质量。SA增加了种子的活力,促进了在盐水条件下萌发的改善。
SALICYLIC ACID AS A SALINE STRESS ATTENUATOR IN THE PHYSIOLOGICAL QUALITY OF Erythrina velutina SEEDS
ABSTRACT Salinity is one of the problems that limit plant development, with the germination, growth, and initial establishment stages being the most sensitive to saline stress. Erythrina velutina, popularly known as “mulungu” in Brazil, is a species native to the Caatinga biome, which grows in conditions of soil rich in salts. The damage caused by salinity to the quality of its seeds and the use of techniques that mitigate such effects are little known. Thus, this work aimed to evaluate salicylic acid as a mitigator of saline stress in the physiological quality of mulungu seeds. The quality of two seed lots from two Brazilian states (L1: Mossoró, Rio Grande do Norte, and L2: Pentencostes, Ceará) was evaluated. A completely randomized design in a 2 (seed soaking with salicylic acid (SA) - distilled water and 1.0 mM SA) × 4 (electrical conductivity of irrigation water - ECw - 0.0, 3.0, 6.0 and 9.0 dS m-1) factorial scheme with four replications of 50 seeds each was used. Saline stress reduces the quality of mulungu seeds and seedlings. SA increases the vigor of the seeds, promoting improvements in germination under saline conditions.
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