Evaluation of Characteristics Related to Photosynthetic Rate and Leaf Area Production in Mungbean Genotypes
Evaluation of Characteristics Related to Photosynthetic Rate and Leaf Area Production in Mungbean Genotypes
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绿豆基因型光合速率和叶面积产量相关特性的评价
DOI：
10.1626/jcs.63.502
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发表时间：
1994
影响因子：
--
通讯作者：
A. Hamid
中科院分区：
文献类型：
--
作者：
M. T. Islam;W. Agata;F. Kubota;A. Hamid
63份绿豆(Vigna Radiata(L.)在盆栽条件下对从亚洲不同国家采集的品种(Wilczek)进行了鉴定。光合作用速率(Pn)及其相关因子存在较大的基因型差异。各品种的变异也都很大，但叶片电导率(Gl)的变异最大。净光合速率与其相关因素呈正相关。其中，叶肉导度(GM)最高。多数品种的蒸腾速率(Tr)高于其他作物。虽然Tr与Gl有很高的相关性，但Tr在Gl的0.75mol·m-2·S-1以上就饱和了。结果表明，Gl高的品种水分利用效率(WUE)高于其他类型。根据Pn值将所有品种分为高Pn组、中Pn组和低Pn组。与中、低净光合速率组相比，高净光合速率组的相关因子值较高。虽然叶面积增加率(LIR)和顶叶平均面积(TLA)与净光合速率(Pn)显著相关，但出叶率(LER)与净光合速率(Pn)无显著相关。比叶重(SLW)与Pn显著相关。因此，气孔频率与Gl、平均TLA、LIR和SLW关系密切，可作为绿豆Pn改良的选择标准。
Characteristics related to photosynthetic rate and leaf area production of 63 mungbean (Vigna radiata (L.) Wilczek) genotypes collected from different Asian countries were evaluated in pot culture conditions. There were large genotypic differences in photosynthetic rates (Pn) and its related factors. Each of the variations was also quite large, but that of leaf conductance (Gl) was the largest. Pn was positively correlated with its related factors. Among them, mesophyll conductance (Gm) was the highest. The transpiration rate (Tr) of most of the genotypes was higher than that of other crops. Although there was a high correlation between Tr and Gl, Tr was saturated at over 0.75 mol·m-2·s-1 of Gl. As a result, genotypes with high Gl resulted in higher water use efficiency (WUE) compared with other genotypes. Based on Pn values, all the genotypes were classified into three groups, high Pn, medium Pn and low Pn. Genotypes belonging to the high Pn group had high values of related factors as compared with that of the medium and low Pn groups. Although the leaf area increasing rate (LIR) and mean area of the terminal leaflet (TLA) had a significant correlation with Pn, the leaf emergence rate (LER) did not. Specific leaf weight (SLW) significantly related with Pn. It is, therefore, considered that stomatal frequency which relates strongly to Gl, mean TLA, LIR and SLW, can be used as selection criteria for improvement of Pn in mungbean genotypes.