Abstract: In order to clarify the effect of new plant growth regulator CGR_3-1 on mungbean growth,a comparative study was conducted to study the effect of 100 mg/L CGR_3-1 on mungbean photosynthetic gas exchange parameters,photosynthate,yield and fatty acid composition by using Lüfeng 2 and Lüfeng 5 as test materials.The results indicated that CGR_3-1 made no significant effects on photosynthetic gas exchange parameters at late seed-filling stage when sprayed at the third trifoliolate stage(V3).Applying CGR_3-1 at early blooming stage(R1) significantly decreased the net photosynthetic rate of Lüfeng 2 at late seed-filling stage compared to distilled water treatment(CK) by 27.10%.In terms of photosynthate,CGR_3-1 promoted the Lüfeng 2 sucrose and starch contents in flowering stage when applied at V3 stage,which increased by 54.68% and 62.10% compared to CK group,respectively.The application of CGR_3-1 significantly decreased the Lüfeng 5 sucrose content at late seed-filling stage,however,the starch content increased.Applying CGR_3-1 at R1 stage had no significant impact on sucrose content,however,the contents of starch in Lüfeng 2 and Lüfeng 5 decreased by 22.00% and 15.53% compared to CK group,respectively.The effects of two spraying stages on 100-grain weight were different. Spraying at V3 stage decreased the 100-grain weight,however,it was increased when sprayed at R1 stage.CGR_3-1 application at V3 stage improved the number of pods and grains,and increased the yield.In addition,the plant growth regulator changed the mungbean fatty acid composition.Applying CGR_3-1 at V3 stage was beneficial to the improvement of linoleic acid.Collectively,the application of CGR_3-1 at V3 stage increased the mungbean yield per plant and improved the quality.

Key words: Mungbean, Plant growth regulator, CGR_3-1 , Yield, Photosynthetic gas exchange parameter;Fatty acid composition

摘要： 为明确新型植物生长调节剂CGR_3-1对绿豆生长的影响,以绿豆品种绿丰2号和绿丰5号为材料，对比研究了三节期（V3）和始花期（R1）喷施100 mg/L 植物生长调节剂CGR_3-1［1-(3,3-二甲基-2-氧代丁基)-1H-1,2,4-三氮唑-3-羧酸］对绿豆叶片光合气体交换参数、碳同化产物、产量及籽粒脂肪酸组成的影响。结果表明，V3期喷施CGR_3-1对鼓粒盛期绿豆叶片光合气体交换参数无明显影响，R1期喷施则使鼓粒盛期绿丰2号叶片净光合速率较蒸馏水处理（CK）显著降低27.10%。光合碳同化产物结果表明，V3期喷施CGR_3-1使绿丰2号始花期叶片蔗糖、淀粉含量分别较CK显著增加54.68%、62.10%，使绿丰5号鼓粒盛期叶片蔗糖含量显著降低，淀粉含量极显著提高；R1期喷施CGR_3-1对鼓粒盛期绿豆叶片蔗糖含量无显著影响，但使绿丰2号和绿丰5号叶片淀粉含量分别较CK极显著降低22.00%和15.53%。V3期喷施CGR_3-1降低籽粒百粒质量，而R1期喷施则增加百粒质量。V3期喷施CGR_3-1提高了绿豆单株荚数、单株粒数，从而提高绿豆产量。喷施CGR_3-1改变了绿豆籽粒的脂肪酸组成，V3期喷施CGR_3-1有利于亚油酸含量的提高。整体而言，V3期喷施植物生长调节剂CGR_3-1可有效提高绿豆单株产量，改善品质。

关键词: 绿豆, 植物生长调节剂, CGR_3-1, 产量, 光合气体交换参数, 脂肪酸组成