Late seed maturation improves the preservation of seedling emergence during storage in soybean
Late seed maturation improves the preservation of seedling emergence during storage in soybean
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DOI：
10.1590/2317-1545v40n2191893
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发表时间：
2018-06-01
影响因子：
1
通讯作者：
Silva, Edvaldo Aparecido Amaral da
中科院分区：
文献类型：
--
作者：
Basso, Denise Puntel;Hoshino-Bezerra, Andrea Akemi;Silva, Edvaldo Aparecido Amaral da
在干燥储存或长寿期间的长期存活是避免恶化导致活力丧失的先决条件。通常通过储存后发芽的能力来评估寿命。在获得脱水耐性后，在种子成熟过程中，它逐渐增加。然而，发芽的能力只是作物建立成功的一部分。在大豆BRS 284种子灌浆期和灌浆后阶段，研究了种子成熟度对与成苗有关的活力等几个性状抗劣性的影响。在7.1和7.2之间引入了三个新的物候期（7.1.1，7.1.2和7.1.3），以捕捉种子寿命的快速增加。贮藏7-14天后，种子发芽速度开始受到影响，这取决于贮藏期。从7.1.3到干成熟种子，发芽延迟随成熟而增加。贮藏期间两种器官伸长能力丧失50%的时间与发芽丧失的时间相似。此外，在种子成熟后的质量成熟和收获成熟阶段，它稳步增加，突出了种子成熟后期的重要性，为建立种子活力。
Long-term survival during dry storage or longevity is a pre-requisite to avoid deterioration, leading to loss of vigor. Longevity is routinely evaluated by the ability to germinate after storage. It increases progressively during seed maturation, after the acquisition of desiccation tolerance. However, the capacity to germinate represents only a part of the success of crop establishment. How seed maturation affects the resistance of several traits, as vigor, associated with seedling establishment, against detenoration was evaluated dunng seed filling and post-abscission phase of soybean BRS 284 seeds. Three newphenological stages between 7.1 and 7.2 (7.1.1, 7.1.2 and 7.1.3) were introduced to capture the rapid increase in seed longevity. Germination speed started to be affected at 7-14 days after storage depending on the stages. The delay on germination increased with maturation from 7.1.3 to dry mature seeds. The time to 50% loss of elongation capacity of both organs during storage was similar to that of loss of germination. Also, it increased steadily dunng seed maturation after mass matunty and harvest matunty stages, highlighting the importance of the late phase of seed maturation for building seed vigor.