甘蔗(SaccharumofficinarumL.),具有工业重要性的全球种植碳水化合物生产作物由于其糖育性质而受到土壤盐分的挑战。水分胁迫加上过量钠(Na)离子积累导致的细胞和代谢变化在作物早期发育阶段是不可逆的破坏,通常会导致作物完全失败。因此,本研究旨在探索水杨酸作为一种引发材料的潜力,以减轻盐胁迫在发芽和早期生长阶段对甘蔗的负面影响。五剂水杨酸(0[水引发][对照],0.5mM,1mM,1.5mM和2mM)针对三种盐度水平(0.5dSm-1[对照],4dSm-1和8dSm-1)在多室环境中。结果显示11.2%,18.5%,25.4%,38.6%,最终发芽的平均增加,发芽能量,幼苗长度和幼苗活力指数,随后平均发芽时间减少21%。幼苗早期生长期间的调查显示21.6%,17.5%,27.0%,39.9%,10.7%,11.5%,17.5%,47.9%,株高总体增加35.3%和20.5%,总叶面积,射击干物质,根干物质,叶子绿色,相对含水量,膜稳定性指数,脯氨酸含量,由于水杨酸引发,总抗氧化活性和钾(K)离子积累分别减少了24.9%的Na离子积累和35.8%的Na/K比。萌发,即使在8dSm-1盐度水平下,初生的苗木生长和理化性状的恢复也比非初生的苗木非常令人满意。这项研究应为制定盐度管理方法以提高甘蔗生产力提供有用的信息。
Sugarcane (Saccharum officinarum L.), a globally cultivated carbohydrate producing crop of industrial importance is being challenged by soil salinity due to its glycophytic nature. Water stress coupled with cellular and metabolic alterations resulting from excess sodium (Na+) ion accumulation is irreversibly damaging during early crop developmental stages that often results in complete crop failure. This study therefore aimed to explore the potential of salicylic acid as a sett priming material to mitigate the negative effects of salt stress on sugarcane during germination and early growth stages. Five doses of salicylic acid (0 [hydropriming] [control], 0.5 mM, 1 mM, 1.5 mM and 2 mM) were tested against three levels of salinity (0.5 dS m-1 [control], 4 dS m-1, and 8 dS m-1) within a polyhouse environment. Results revealed 11.2%, 18.5%, 25.4%, and 38.6%, average increase in final germination, germination energy, seedling length and seedling vigor index respectively with a subsequent reduction of 21% mean germination time. Investigations during early seedling growth revealed 21.6%, 17.5%, 27.0%, 39.9%, 10.7%, 11.5%, 17.5%, 47.9%, 35.3% and 20.5% overall increase in plant height, total leaf area, shoot dry matter, root dry matter, leaf greenness, relative water content, membrane stability index, proline content, total antioxidant activity and potassium (K+) ion accumulation respectively with a subsequent reduction of 24.9% Na+ ion accumulation and 35.8% Na+/K+ ratio due to salicylic acid priming. Germination, seedling growth and recovery of physiochemical traits were highly satisfactory in primed setts than non-primed ones even under 8 dS m-1 salinity level. This study should provide useful information for strategizing salinity management approaches for better productivity of sugarcane.