摘要
利用种子包衣技术将MgH2包衣于大豆,并设置MgO包衣大豆组作阳性对照和无包衣大豆组作阴性对照,系统研究了不同处理对大豆发芽势、发芽率、发芽指数,以及幼苗的地上/地下部鲜重、茎长/粗、总根长、侧根数和叶面积等表型性状的影响.结果表明,包衣对大豆萌发和幼苗生长的促进作用从小到大为:无包衣组＜MgO包衣组＜MgH2包衣组.采用SPSS进行综合分析,结果显示,MgH2-L3包衣大豆组综合得分最高,为最佳包衣配方.MgH2包衣组大豆的最优表现可能归因于镁与氢的协同生物学效应.
Abstract
Hydrogen has potential biological effects of promoting seed germination and plant growth.Nevertheless,since hydrogen is highly volatile,it is extremely challengng to coat seeds with hydrogen.Solid-state magnesium-based hydrogen storage material magnesium hydride(MgH2)could offer reliable hydrogen for seed because of its high hydrogen storage density,rich hydrogen supply by hydrolysis,long-term sustained release,and easy use.This study used a seed coating technology to coat soybeans by MgH2 and set up the MgO-coated soybean group as a positive control and the un-coated soybean group as a negative control.The effects of different treatments on soybean germination potential,germination rate,germination index and the influence of phenotypic traits,such as aboveground/underground fresh weight,stem length/thickness,total root length,number of lateral roots and leaf area of seedlings,were comprehensively investigated.Results showed that the promotion effects of different coating treatments on soybean germination and seedling growth were in the order:non-coating group＜MgO coating group＜MgH2 coating group.Comprehensive analysis was conducted using SPSS,and results suggested that the MgH2-L3 coated soybean group exhibited the highest comprehensive score and was thus the best coating recipe.Such optimal germination and growth performance of soybeans by MgH2-coatings may be attributed to the synergistic biological effects of both magnesium and hydrogen released by hydrolysis of MgH2.
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