Storage nitrogen co-ordinates leaf expansion and photosynthetic capacity in winter oilseed rape
| العنوان: | Storage nitrogen co-ordinates leaf expansion and photosynthetic capacity in winter oilseed rape |
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| المؤلفون: | Tao Liu, Tao Ren, Jianwei Lu, Rihuan Cong, Philip J. White |
| المصدر: | Journal of Experimental Botany |
| بيانات النشر: | Oxford University Press (OUP), 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | 0106 biological sciences, 0301 basic medicine, China, Nitrogen, leaf expansion, Physiology, Field experiment, Brassica, chemistry.chemical_element, Plant Science, storage nitrogen, Photosynthesis, 01 natural sciences, 03 medical and health sciences, Brassica napus L, Relative growth rate, Nitrogen cycle, Biomass (ecology), photosynthesis, biology, Brassica napus, fungi, food and beverages, biology.organism_classification, Research Papers, Photosynthetic capacity, Plant Leaves, Horticulture, 030104 developmental biology, chemistry, nitrogen partitioning, Growth and Development, storage nitrogen form, 010606 plant biology & botany |
| الوصف: | Optimal storage nitrogen (N) content in the leaf is critical to co-ordinate leaf expansion and photosynthetic capacity. Turnover between storage N and photosynthetic N could maintain a high photosynthetic rate. Storage nitrogen (N) is a buffer pool for maintaining leaf growth and synthesizing photosynthetic proteins, but the dynamics of its forms within the life cycle of a single leaf and how it is influenced by N supply remain poorly understood. A field experiment was conducted to estimate the influence of N supply on leaf growth, photosynthetic characteristics, and N partitioning inthe sixth leaf of winter oilseed rape (Brassica napus L.) from emergence through senescence. Storage N content (Nstore) decreased gradually along with leaf expansion. The relative growth rate based on leaf area (RGRa) was positively correlated with Nstore during leaf expansion. The water-soluble protein form of storage N was the main N source for leaf expansion. After the leaves fully expanded, the net photosynthetic rate (An) followed a linear–plateau response to Nstore, with An stabilizing at the highest value above a threshold and declining below the threshold. Non-protein and SDS (detergent)-soluble protein forms of storage N were the main N sources for maintaining photosynthesis. For the leaf N economy, storage N is used for co-ordinating leaf expansion and photosynthetic capacity. N supply can improve Nstore, thereby promoting leaf growth and biomass. |
| تدمد: | 1460-2431 0022-0957 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ec98a30b7159a9f6b0fda09f6409e51Test https://doi.org/10.1093/jxb/ery134Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....9ec98a30b7159a9f6b0fda09f6409e51 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14602431 00220957 |
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