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The Lateral Leaflet Suppression 1 (LLS1), encoding the MtYUC

作者: 潮帝 来源: 潮帝文学网 发布时间: 2020年06月29日 22:06:33

The Lateral Leaflet Suppression 1 (LLS1), encoding the MtYUCCA1 protein, regulates lateral leaflet development in Medicago truncatula 

  论文编号:  
作者:   Zhao BL; He LL; Jiang C  
刊物名称:   New Phytologist  
所属学科:  
论文题目英文:   The Lateral Leaflet Suppression 1 (LLS1), encoding the MtYUCCA1 protein, regulates lateral leaflet development in Medicago truncatula  
年:   Mar 2020  
卷:   online  
期:  
页:  
联系作者:   Liu RY; Chen JH  
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影响因子:   7.299  
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摘要:  

In species with compound leaves, the positions of leaflet primordia initiation are associated with local peaks of auxin accumulation. However, the role of auxin during the late developmental stages and outgrowth of compound leaf remains largely unknown.

Using genome resequencing approaches, we identified insertion sites at four alleles of the LATERAL LEAFLET SUPPRESSION1 (LLS1) gene, encoding the auxin biosynthetic enzyme YUCCA1 in Medicago truncatula.

Linkage analysis and complementation tests showed that the lls1 mutant phenotypes were caused by the Tnt1 insertions that disrupted the LLS1 gene. The transcripts of LLS1 can be detected in primordia at early stages of leaf initiation and later in the basal regions of leaflets, and finally in vein tissues at late leaf developmental stages. The vein numbers and auxin level are reduced in lls11 mutant. Analysis of the lls1 sgl1 and lls1 palm1 double mutants uncovered that SGL1 is epistatic to LLS1, and LLS1 works with PALM1 in an independent pathway to regulate the growth of lateral leaflets.

Our work demonstrates that the YUCCA1/YUCCA4 subgroup plays very important roles in the outgrowth of lateral leaflets during the compound leaf development of M. truncatula, in addition to leaf venation.

 
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