Abstract：
Cultivating productive paddy crops on salty soil to maximise production is a challenging approach to meeting the world\'s growing food demand. Thus, determining salinity tolerance rates in specific paddy cultivars is urgently needed. In this study, the salt tolerance traits of selected paddy cultivars, ADT45 and ADT39, were investigated by analysing germination, metabolites (pigments and biomolecules), and enzymatic (Superoxide dismutase (SOD), Catalase (CAT), and Peroxidase (POD) adaptation strategies as salt-stress tolerance mechanisms. This study found that salinity-induced reactive oxygen species (ROS) were efficiently detoxified by the antioxidant enzymes Superoxide dismutase (SOD), Catalase (CAT), and Peroxidase (POD) in ADT45 paddy varieties, followed by ADT39. Salinity stress had a significant impact on pigments and essential biomolecules in ADT45 and ADT39 paddy cultivars, including total chlorophyll, anthocyanin, carotenoids, ascorbic acid, hydrogen peroxide (H2O2), malondialdehyde, and proline. ADT45 demonstrated a significant relationship between H2O2 and antioxidant enzyme levels, followed by ADT39 paddy but not IR64. Morphological, physiological, and biochemical analyses revealed that ADT45, followed by ADT39, is a potential salt-tolerant rice cultivar.
摘要：
在盐渍土壤上种植高产水稻作物以最大限度地提高产量是满足世界日益增长的粮食需求的一种具有挑战性的方法。因此，迫切需要确定特定水稻品种的耐盐性。在这项研究中,选定水稻品种的耐盐性状，ADT45和ADT39，通过分析发芽，代谢物（色素和生物分子），和酶(超氧化物歧化酶(SOD)，过氧化氢酶(CAT),和过氧化物酶（POD）适应策略作为盐胁迫耐受机制。本研究发现，盐度诱导的活性氧（ROS）被抗氧化酶超氧化物歧化酶（SOD）有效地解毒，过氧化氢酶(CAT),ADT45水稻品种的过氧化物酶（POD），其次是ADT39。盐胁迫对ADT45和ADT39水稻品种的色素和必需生物分子有显著影响，包括总叶绿素，花青素,类胡萝卜素，抗坏血酸,过氧化氢(H2O2),丙二醛，和脯氨酸。ADT45表明H2O2和抗氧化酶水平之间存在显著关系，其次是ADT39稻田，但不是IR64。形态学,生理,生化分析表明，ADT45和ADT39是潜在的耐盐水稻品种。
