作者
Margaret Bezrutczyk, Thomas Hartwig, Marc Horschman, Si Nian Char, Jinliang Yang, Bing Yang, Wolf B Frommer, Davide Sosso
发表日期
2018/4
期刊
New phytologist
卷号
218
期号
2
页码范围
594-603
简介
- Crop yield depends on efficient allocation of sucrose from leaves to seeds. In Arabidopsis, phloem loading is mediated by a combination of SWEET sucrose effluxers and subsequent uptake by SUT1/SUC2 sucrose/H+ symporters. ZmSUT1 is essential for carbon allocation in maize, but the relative contribution to apoplasmic phloem loading and retrieval of sucrose leaking from the translocation path is not known.
- Here we analysed the contribution of SWEETs to phloem loading in maize.
- We identified three leaf‐expressed SWEET sucrose transporters as key components of apoplasmic phloem loading in Zea mays L. ZmSWEET13 paralogues (a, b, c) are among the most highly expressed genes in the leaf vasculature. Genome‐edited triple knock‐out mutants were severely stunted. Photosynthesis of mutants was impaired and leaves accumulated high levels of soluble sugars and starch. RNA‐seq revealed …
学术搜索中的文章
Impaired phloem loading in zmsweet13a, b, c sucrose transporter triple knock‐out mutants in Zea mays
M Bezrutczyk, T Hartwig, M Horschman, SN Char… - New phytologist, 2018