期刊
JOURNAL OF INTEGRATIVE PLANT BIOLOGY
卷 59, 期 4, 页码 261-274出版社
WILEY
DOI: 10.1111/jipb.12525
关键词
-
资金
- Bioplatforms Australia Pty Ltd, a National Collaborative Research Infrastructure Strategy, 5.1 Biomolecular Platforms and informatics investment
- Australian Centre for Plant Functional Genomics
- Australian Research Council [LP130101055]
- DuPont Pioneer
- Grains Research and Development Corporation [GRS10437]
- Australian Research Council [LP130101055] Funding Source: Australian Research Council
Maximizing NO3- uptake during seedling development is important as it has a major influence on plant growth and yield. However, little is known about the processes leading to, and involved in, the initiation of root NO3- uptake capacity in developing seedlings. This study examines the physiological processes involved in root NO3- uptake and metabolism, to gain an understanding of how the NO3- uptake system responds to meet demand as maize seedlings transition from seed N use to external N capture. The concentrations of seed-derived free amino acids within root and shoot tissues are initially high, but decrease rapidly until stabilizing eight days after imbibition (DAI). Similarly, shoot N% decreases, but does not stabilize until 12-13 DAI. Following the decrease in free amino acid concentrations, root NO3- uptake capacity increases until shoot N% stabilizes. The increase in root NO3- uptake capacity corresponds with a rapid rise in transcript levels of putative NO3- transporters, ZmNRT2.1 and ZmNRT2.2. The processes underlying the increase in root NO3- uptake capacity to meet N demand provide an insight into the processes controlling N uptake.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据