PDF(Pubmed)
Abstract：
Despite the considerable efforts reported so far to enhance seed priming, novel ideas are still needed to be suggested to this sustainable sector of agri-seed industry. This could be the first study addressing the effect of nitric oxide (NO) under open field conditions. The impacts of seed redox-priming using sodium nitroprusside (SNP) and osmo-priming with calcium chloride (CaCl2), both applied individually or successively, were investigated under salinity stress conditions on wheat plants (Triticum aestivum L.). Various parameters, including water relations, growth, yield, photosynthetic pigments, and antioxidant activities (enzymatic and non-enzymatic), were recorded to assess the outcomes of these priming agents on mitigating the negative impacts of salinity stress on wheat plants. Water consumptive use (ETa) and irrigation water applied (IWA) decreased with seeds priming. Successive priming with SNP + CaCl2 induced the greatest values of crop water productivity (CWP), irrigation water productivity (IWP), seed index, grain yield and grain nitrogen content.Under salinity stress, the dry weight of plants was decreased. However, hydro-priming and successive chemical priming agents using combinations of calcium chloride and sodium nitroprusside (CaCl2 + SNP & SNP + CaCl2) preserved growth under salinity stress.Individual priming with sodium nitroprusside (SNP) and calcium chloride (CaCl2) resulted in the lowest recorded content of sodium in the shoot, with a value of 2 ppm. On the other hand, successive priming using CaCl2 + SNP or SNP + CaCl2 induced the contents of potassium in the shoot, with values of 40 ppm and 39 ppm, respectively. Malondialdehyde decreased in shoot significantly withapplicationof priming agents. Successive priming with CaCl2 + SNP induced the highest proline contents in shoot (6 µg/ g FW). The highest value of phenolics and total antioxidants contents in shoot were recorded under successive priming using CaCl2 + SNP and SNP + CaCl2.Priming agents improved the activities of ascorbate peroxidase and catalase enzymes. The successive priming improved water relations (ETa, IWA, CWP and IWP) and wheat growth and productivity under salinity stress more than individual priming treatments.
摘要：
尽管到目前为止，据报道在增强种子引发方面做出了相当大的努力，仍然需要向农业种子行业的可持续发展部门提出新的想法。这可能是第一个研究一氧化氮（NO）在开放场条件下的影响的研究。使用硝普钠（SNP）和氯化钙（CaCl2）进行种子氧化还原引发的影响，既可以单独应用，也可以依次应用，在盐度胁迫条件下对小麦植株（TriticumaestivumL.）进行了研究。各种参数，包括水关系，增长,产量，光合色素,和抗氧化活性（酶和非酶），记录以评估这些引发剂对减轻盐度胁迫对小麦植株的负面影响的结果。随着种子引发，耗水量（ETa）和灌溉用水（IWA）减少。用SNP+CaCl2连续引发引起作物水分生产率(CWP)的最大值，灌溉水生产率（IWP），种子指数，籽粒产量和籽粒氮含量。在盐度胁迫下，植株干重下降。然而,使用氯化钙和硝普钠（CaCl2SNP和SNPCaCl2）的组合进行水引发剂和连续的化学引发剂在盐度胁迫下保持了生长。用硝普钠（SNP）和氯化钙（CaCl2）进行个体引发导致芽中钠的最低记录含量，值为2ppm。另一方面,使用CaCl2SNP或SNPCaCl2连续引发诱导芽中的钾含量，值分别为40ppm和39ppm，分别。使用引发剂可显着降低芽中的丙二醛。用CaCl2SNP连续引发诱导芽中脯氨酸含量最高（6µg/gFW）。在使用CaCl2SNP和SNPCaCl2连续引发下，记录了芽中酚类物质和总抗氧化剂含量的最高值。引发剂提高了抗坏血酸过氧化物酶和过氧化氢酶的活性。连续的启动改善了水关系(ETa，IWA,盐分胁迫下的CWP和IWP）和小麦生长和生产力比单个引发处理更多。
