不同供硼水平对绿豆植株形态和生长发育的影响

在生长室利用水培研究了不同供硼水平对绿豆植株形态和生长发育的影响.结果表明,缺硼抑制绿豆生长,对地下部的影响比对地上部的影响大,冠根比增加;缺硼明显抑制叶面积,比叶面积(SLA)下降;缺硼使叶重比(LWR)提高和叶片脉间失绿、变厚、变脆.与适量供硼相比,过量供硼也影响绿豆的生长,但对冠根比没有影响,过量供硼对植株地上部和地下部具有相同的抑制作用;硼中毒导致成熟叶片过旱脱落,使光合面积变小;过量供硼对比叶面积和叶重比没有影响.

Effects of different boron concentration on the morphology and growth of mung bean

Under conditions of growth chamber,hydroponic culture was employed to investigate the effects of different boron concentration on the morphology and growth of mung bean(Phaseolus aureus Roxb.).The results showed that limited supply of boron reduced mung bean biomass production,which was accompanied with an increased shoot to root ratio.Leaf expansion also was inhibited together with specific leaf area(SLA) by boron deficiency.The boron deficiency plant appears inter-venial chlorosis,thickening,crisping leaves and increased leaf weight ratio(LWR).Compared with optimum boron supply concentration,too high boron supply levels badly influenced plant growth,however did not induce significant changes in shoot to root ratio,which suggest that supra-optimum boron supply has similar influence on above-ground and blow-ground growth.Born toxicity led to early abscission of the older leaves,reducing total photosynthesis leaf area,but did not influence SLA or LWR.