韧皮部
蔗糖
马尾松
植物
光合作用
糖
生物
生物物理学
化学
作者
Xiaoyu Han,Chen Gao,Buyou Liang,Jingxuan Cui,Qiyu Xu,Alexander Schulz,Johannes Liesche
出处
期刊:Tree Physiology
[Oxford University Press]
日期:2021-11-19
标识
DOI:10.1093/treephys/tpab149
摘要
Abstract Sucrose is the central unit of carbon and energy in plants. Active intercellular transport of sucrose is mediated by sucrose transporters (SUTs), genes for which have been found in the genomes of all land plants. However, they have only been assigned functions in angiosperm species. Here, we cloned two types of SUTs from two gymnosperms, the conifers Cedrus deodara (Roxb. G. Don) and Pinus massoniana Lambert, and analyzed their sucrose transport activities. Uptake of the fluorescent sucrose-analog esculin into tobacco epidermis cells expressing the conifer SUT confirmed their transport ability. To determine their function in planta, we investigated their mRNA abundance in relation to photosynthesis and sugar levels in leaves, inner bark, wood and roots. Combined with measurements of protein abundance and immunolocalization of C. deodara SUTs, our results suggest a role for CdSUT1G and CdSUT2 in supporting phloem transport under varying environmental conditions. The implications of these findings regarding conifer physiology and SUT evolution are discussed.
科研通智能强力驱动
Strongly Powered by AbleSci AI