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首页> 外文期刊>African Journal of Biotechnology >Osmopriming improves tomato seed vigor under aging and salinity stress
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Osmopriming improves tomato seed vigor under aging and salinity stress

机译：渗透处理可改善老化和盐分胁迫下的番茄种子活力

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This study investigates the effects?of osmopriming on tomato (Lycopersicon esculentum?M.) hybrid seed vigor under aging and salinity stress. Tomato seeds of the ZZ1 hybrid variety, stored for four years under natural (aged) or -20°C (unaged) conditions were primed in 10% (w/v) polyethylene glycol (PEG) solution for 2 d at 20±1°C in the dark. The seed?vigor was evaluated at 25±1°C for 7 d under normal (water)?and?100 mM NaCl conditions, respectively. Results show that the germination percentage (GP), germination index (GI) and mean germination rate (MGR) of primed, aged seeds were significantly enhanced with a substantial increase in the radicle length (RL), shoot length (SL) and total fresh weight (FW) compared with unprimed aged seeds. Similarly, the GI, MGR?and FW significantly increased in primed seeds compared with unprimed seeds under salinity stress, while GP, RL and SL did not show significant differences.?Furthermore, a?decline in the relative electrolyte leakage (REL) and in malondialdehyde (MDA) was detected in primed seeds during the imbibition stage compared with unprimed seeds under aging and salinity stress.?The negative correlations between seed vigor and REL and MDA?were observed?which suggests that seed priming improves seed vigor under stress conditions associated with a decrease in?seed?lipid peroxidation.
机译：本研究调查了渗透和老化对番茄（Lycopersicon esculentum？M。）杂种种子活力在衰老和盐分胁迫下的影响。将ZZ1杂种的番茄种子在自然（老化）或-20°C（未老化）条件下储存4年，在20％±1°C的10％（w / v）聚乙二醇（PEG）溶液中灌注2天。 C在黑暗中。在正常（水）？和？100 mM NaCl条件下，分别在25±1°C下评估种子活力7 d。结果表明，已发芽的，老化的种子的发芽率（GP），发芽指数（GI）和平均发芽率（MGR）显着提高，胚根长度（RL），苗长（SL）和总新鲜量显着增加。重量（FW）与未处理的老化种子相比。同样，在盐分胁迫下，发芽种子的GI，MGR和FW显着高于未引种种子，而GP，RL和SL则没有显着差异。此外，相对电解质泄漏（REL）和在老化和盐分胁迫下，吸水种子中的丙二醛（MDA）与未浸过种子相比有所检测。“观察到种子活力与REL和MDA呈负相关”，这表明在压力条件下种子启动可以提高种子活力。种子脂质过氧化作用降低。

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