首页> 外文期刊>Plant and cell physiology >Soyasaponins: A New Class of Root Exudates in Soybean (Glycine max)
【24h】

Soyasaponins: A New Class of Root Exudates in Soybean (Glycine max)

机译:Soyasaponins: A New Class of Root Exudates in Soybean (Glycine max)

获取原文
获取原文并翻译 | 示例
           

摘要

Root exudates are plant metabolites secreted from the roots into the soil. These exudates are involved in many important biological processes, including acquisition of nutrients, defense and signaling to rhizosphere bacteria, such as isoflavones of soybean crucial for the symbiosis with rhizobium. Less is known, however, about other types of root exudates. This study shows that soybean roots secrete large amounts of soyasaponins (triterpenoid glycosides) as root exudates. The soyasaponins are classified into four groups, with group A being the most secreted of these compounds, whereas DDMP (2,3-dihydro-2,5-dihydroxy-6-methyl-4H-pyran-4-one) soyasaponins is the group showing greatest accumulation in root tissues, suggesting a selection system for secreted compounds. Time-course experiments showed that the soyasaponin secretion peaked during early vegetative stages. In particular, soyasaponin Ah was the major compound secreted by soybean roots, whereas the deacetylated derivative Af was the major compound secreted specifically during the VE stage. The secretion of soyasaponins containing glycosyl moieties is an apparent loss of photosynthates. This phenomenon has been also observed in other legume species, although the composition of secreted soyasaponins is plant species dependent. The identification of triterpenoid saponins as major metabolites in legume root exudates will provide novel insights into chemical signaling in the rhizosphere between plants and other organisms.

著录项

获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号