Joint International Research Laboratory of Agriculture and Agri-Product Safety of the Ministry of Education of China, Yangzhou University, Yangzhou, 225009, China.
Department of Agronomy, Faculty of Agricultural and Environmental Science, University of Gadarif, Al Qadarif, Sudan.
Sci Rep. 2021 Mar 23;11(1):6672. doi: 10.1038/s41598-021-84713-9.
Salinity one of environmental factor that limits the growth and productivity of crops. This research was done to investigate whether GA (0, 144.3, 288.7 and 577.5 μM) and nitrogen fertilizer (0, 90 and 135 kg N ha) could mitigate the negative impacts of NaCl (0, 100, and 200 mM NaCl) on emergence percentage, seedling growth and some biochemical parameters. The results showed that high salinity level decreased emergence percentage, seedling growth, relative water content, chlorophyll content (SPAD reading), catalase (CAT) and peroxide (POD), but increased soluble protein content, superoxide dismutase (SOD) activity and malondialdehyde (MDA) content. The SOD activity was decreased by nitrogen. However, the other measurements were increased by nitrogen. The interactive impact between nitrogen and salinity was significant in most parameters except EP, CAT and POD. The seedling length, dry weight, fresh weight, emergence percentage, POD, soluble protein and chlorophyll content were significantly affected by the interaction between GA and salinity. The GA and nitrogen application was successful mitigating the adverse effects of salinity. The level of 144.3 and 288.7 μm GA and the rate of 90 and 135 kg N ha were most effective on many of the attributes studied. Our study suggested that GA and nitrogen could efficiently protect early seedlings growth from salinity damage.
盐度是限制作物生长和生产力的环境因素之一。本研究旨在探讨赤霉素（GA）（0、144.3、288.7 和 577.5 μM）和氮肥（0、90 和 135 kg N ha）是否可以减轻 NaCl（0、100 和 200 mM NaCl）对发芽率、幼苗生长和一些生化参数的负面影响。结果表明，高盐度水平降低了发芽率、幼苗生长、相对含水量、叶绿素含量（SPAD 读数）、过氧化氢酶（CAT）和过氧化物酶（POD），但增加了可溶性蛋白含量、超氧化物歧化酶（SOD）活性和丙二醛（MDA）含量。氮会降低 SOD 活性。然而，其他测量值则会因氮而增加。除 EP、CAT 和 POD 外，氮和盐度之间的相互作用对大多数参数都有显著影响。幼苗长度、干重、鲜重、发芽率、POD、可溶性蛋白和叶绿素含量受到 GA 和盐度相互作用的显著影响。GA 和氮的应用成功减轻了盐度的不利影响。144.3 和 288.7 μm GA 以及 90 和 135 kg N ha 的施用量对研究的许多属性最有效。我们的研究表明，GA 和氮可以有效地保护早期幼苗免受盐度伤害。
