Bicarbonate stimulates non-structural carbohydrate pools of Camptotheca acuminata | |
Sen Rao; Yanyou Wu; Rui Wang | |
刊名 | Physiologia Plantarum
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2019 | |
卷号 | 165期号:4页码:780-789 |
英文摘要 | The role of root‐derived dissolved inorganic carbon (DIC) has been emphasized lately, as it can provide an alternative source of carbon for photosynthesis. The fate of newly fixed DIC and its effect on non‐structural carbohydrate (NSC) pools has not been thoroughly elucidated to date. To this end, we used 13C (NaHCO3) as a substrate tracer to investigate the incorporation of newly fixed bicarbonate into the plant organs and NSC compounds of Camptotheca acuminata seedlings for 24 and 72 h. NSC levels across the organs were all markedly increased within 24 h of labeling treatment and afterward only decreased in stems at 72 h. The variation range of NSC concentrations in roots was considerably smaller than in the stem and leaves. As time passed, the δ13C in NSC compounds was significantly affected by 13C labeling and was more positive in the roots than in the stem and leaves. Starch was more 13C‐enriched than was soluble carbohydrate, and the δ13C of root starch was as high as −4.70‰. Bicarbonate incorporation into newly formed NSC compounds contributed up to 0.24% of the root starch within 72 h. These data provided strong evidence that bicarbonate not only acted as a C source that contributed slightly to the NSC pools but also stimulated the increase in NSC pools. The present study expands our understanding of the rapid change of NSC pools across the organs in response to bicarbonate. |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.gyig.ac.cn/handle/42920512-1/10232] ![]() |
专题 | 地球化学研究所_环境地球化学国家重点实验室 |
作者单位 | 1.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China 2.Food and Pharmaceutical Engineering Institute, Guiyang University, Guiyang 550005, China 3.University of Chinese Academy of Sciences, Beijing 100049, China |
推荐引用方式 GB/T 7714 | Sen Rao;Yanyou Wu;Rui Wang. Bicarbonate stimulates non-structural carbohydrate pools of Camptotheca acuminata[J]. Physiologia Plantarum,2019,165(4):780-789. |
APA | Sen Rao;Yanyou Wu;Rui Wang.(2019).Bicarbonate stimulates non-structural carbohydrate pools of Camptotheca acuminata.Physiologia Plantarum,165(4),780-789. |
MLA | Sen Rao;Yanyou Wu;Rui Wang."Bicarbonate stimulates non-structural carbohydrate pools of Camptotheca acuminata".Physiologia Plantarum 165.4(2019):780-789. |
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