核桃叶片中光同化物在不同器官中的分布特征

IF 6.1 2区 生物学 Q1 PLANT SCIENCES
HongLong Hao, ShiWei Wang, CuiFang Zhang, XianAn Yang, ChangJie Xing
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引用次数: 0

摘要

了解光同化物的分布是科学管理果实质量的基础。目前,有关核桃全株光同化物分布的研究还很少。为了弄清5年生'文185'(J. regia 'Wen185')核桃在生长期叶片光同化物向各器官转化的特点,本研究采用13C同位素脉冲标记技术对生长期核桃树进行全株标记,分析了核桃树开花后不同天数各器官13C丰度(δ13C)、13C分配率(R13C)、叶片源强度和果实汇强度的时间变化。结果表明,在花后 30-70 天和 90-110 天期间,13C 在果实和营养枝中的分布较多。然而,在花后 110-130 天,13C 的主要分布转向主干和根部。对源叶和汇果实的深入研究表明,叶片中的叶绿素含量在花后 30-50 天显著增加,表明它们逐渐成为成熟的功能叶。净光合速率的增加导致源强度的增加,此时叶片中光同化物的保留率较高。花后 30 至 70 天,果实鲜重和体积迅速增加,增加了吸收汇的容量,增强了对光同化物的竞争能力。90 至 110 天,叶片光合能力的恢复促进了光同化物的输出。此时,核桃进入油脂转化期,对光氨酵素的需求增加。所有这些因素共同促进了果实中光氨酵素的卸载。总之,在花后 30-70d 和 90-110d 期间保持充足的物质条件并优化树体结构,对于光assimilates 更有效地分配到果实中非常重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Distribution characteristics of photoassimilates in walnut leaves to different organs
The understanding of photoassimilate distribution serves as the fundamental basis for scientific regulation of fruit quality. Currently, there is a scarcity of research on whole-plant scale photoassimilate distribution in walnut. In order to clarify the characteristics of leaf photoassimilates translocation to various organs in 5-year-old 'Wen185' (J. regia 'Wen185') walnut during the growing season, this study used the 13C isotope pulse labeling technique to label the whole plant of walnut trees in the growing season, temporal variations of 13C abundance (δ13C), 13C partition rate (R13C), leaf source strength and fruit sink strength were analyzed in various organs at different days after tree flowering. The findings indicated that during the periods of 30–70 days and 90–110 days after flowering, there was a higher distribution of 13C in fruits and vegetative branches. However, at 110–130 days after flowering, the predominant allocation of 13C shifted towards main trunk and roots. In-depth study of source leaves and sink fruits showed that chlorophyll content in leaves increased significantly 30–50 days after anthesis, indicating that they gradually became mature functional leaves. The increase of net photosynthetic rate led to increase of source strength, and the retention of photoassimilates in leaves was higher at this time. From 30 to 70 days after flowering, the fresh weight and volume of fruit increased rapidly, which increased the capacity of the sink and enhanced the competition ability against photoassimilates. The recovery of photosynthetic capacity of leaves from 90 to 110 days promoted the output of photoassimilates. At this time, walnut entered the oil conversion period, and the demand for photoassimilates increased. All these factors jointly promoted the unloading of photoassimilates in fruit. In summary, maintaining adequate material conditions and optimizing tree structure at 30-70d and 90-110d after anthesis are important for more efficient distribution of photoassimilates to fruit.
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来源期刊
Plant Physiology and Biochemistry
Plant Physiology and Biochemistry 生物-植物科学
CiteScore
11.10
自引率
3.10%
发文量
410
审稿时长
33 days
期刊介绍: Plant Physiology and Biochemistry publishes original theoretical, experimental and technical contributions in the various fields of plant physiology (biochemistry, physiology, structure, genetics, plant-microbe interactions, etc.) at diverse levels of integration (molecular, subcellular, cellular, organ, whole plant, environmental). Opinions expressed in the journal are the sole responsibility of the authors and publication does not imply the editors'' agreement. Manuscripts describing molecular-genetic and/or gene expression data that are not integrated with biochemical analysis and/or actual measurements of plant physiological processes are not suitable for PPB. Also "Omics" studies (transcriptomics, proteomics, metabolomics, etc.) reporting descriptive analysis without an element of functional validation assays, will not be considered. Similarly, applied agronomic or phytochemical studies that generate no new, fundamental insights in plant physiological and/or biochemical processes are not suitable for publication in PPB. Plant Physiology and Biochemistry publishes several types of articles: Reviews, Papers and Short Papers. Articles for Reviews are either invited by the editor or proposed by the authors for the editor''s prior agreement. Reviews should not exceed 40 typewritten pages and Short Papers no more than approximately 8 typewritten pages. The fundamental character of Plant Physiology and Biochemistry remains that of a journal for original results.
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