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|Table of Contents|

不同生长期淡竹叶片解剖结构及其光响应研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2018年04期
Page:
32-38
Column:
专题报道(Ⅱ)
publishdate:
2018-07-12

Article Info:/Info

Title:
Research on the structure and photosynthetic responses of Phyllostachys glauca spathes during flowering
Article ID:
1000-2006(2018)04-0032-07
Author(s):
LIU Guohua XU Qiang DING Yulong LIN Shuyan*
Co-Innovation Center for the Sustainable Forestry in Southern China, Bamboo Research Institute, Nanjing Forestry University, Nanjing 210037, China
Keywords:
Keywords:Phyllostachys glauca flowering period spathe micro-structure photosynthetic responses
Classification number :
S718; S795
DOI:
10.3969/j.issn.1000-2006.201802014
Document Code:
A
Abstract:
Abstract: 【Objective】This study aimed to evaluate the morphological differences in Phyllostachys glauca leaves, analyze changes in the ultrastructure and photosynthetic responses of the spathes during flowering, explain the mechanisms of bamboo leaf senescence, and explore the reasons for bamboo plant death after flowering. 【Method】Normal leaves of non-flowering and flowering bamboo plants and spathes at different flowering periods were collected and fixed in volume fraction 70% FAA in order to observe their microstructure. Some leaves were fixed in glutaraldehyde in order to observe the ultrastructure. The leaves of bamboo plants that were growing well, without damage from pests or disease, were selected for determination of the photosynthetic rate. 【Result】During the flowering period, the distance between the adjacent vascular bundle and transverse area of the spathe vascular bundle decreased with continuous development of flowers. The spathe chloroplasts showed obvious starch grains, thylakoids, matrix lamellae and osmiophilic granules. The chloroplast structure collapsed in the later flowering period. The maximum photosynthetic rate of three different functional leaves decreased by 87.03%, 62.48% and 55.00%, respectively, in the late flowering period of Phyllostachys glauca. 【Conclusion】During the Phyllostachys glauca flowering period, the area and quantity of the leaf vascular bundles continuously decreased, therefore diminishing the ability of leaves to synthesize and transport nutrients. The leaves then gradually became senescent, which may be the major reason for death of bamboo plants.

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Last Update: 2018-07-27