模拟干旱胁迫对黄瓜幼苗组织结构的影响
发布时间：2019-07-09 13:59
【摘要】：为研究不同程度干旱胁迫对黄瓜Cucumis sativus幼苗营养器官中组织和细胞结构的影响,以‘津优1号’‘Jinyou No.1’黄瓜幼苗为试材,分别在营养液中添加质量分数为5%和10%的聚乙二醇(PEG-6000),模拟干旱胁迫条件。结果表明:随着干旱胁迫程度的增加,黄瓜幼苗组织结构变化程度逐渐加剧。在质量分数为5%的PEG-6000处理下,幼苗组织出现根皮层薄壁细胞减少、茎木质部导管萎缩、叶片栅栏组织排列更紧密等特征;而在质量分数为10%的PEG-6000处理下,黄瓜幼苗组织和细胞已发生严重变形、萎缩、排列紊乱、表皮破裂。试验结果表明:黄瓜通过一定程度的组织结构变化适应轻度干旱胁迫,而在重度干旱胁迫下组织结构受到了严重破坏,最终导致器官、组织或细胞功能的丧失。
文内图片：
图片说明：干旱胁迫对黄瓜根尖显微结构的影响
[Abstract]:In order to study the effects of drought stress on the tissue and cell structure of vegetative organs of cucumber Cucumis sativus seedlings, 'Jinyou 1' Jinyou No.1' cucumber seedlings were used as test materials to simulate drought stress by adding 5% and 10% polyethylene glycol (PEG-6000) to the nutrient solution, respectively. The results showed that with the increase of drought stress, the change of tissue structure of cucumber seedlings was gradually aggravated. Under the treatment of 5% PEG-6000, the parenchyma cells in root cortex decreased, the xylem ducts atrophied and the palisade tissue arranged more closely, while under the treatment of 10% PEG-6000, the tissues and cells of cucumber seedlings were seriously deformed, atrophied, arranged disordered and epidermis ruptured. The results showed that cucumber adapted to mild drought stress through a certain degree of tissue structure change, but the tissue structure was seriously damaged under severe drought stress, which eventually led to the loss of organ, tissue or cell function.
【作者单位】： 浙江农林大学农业与食品科学学院;浙江农林大学浙江省农产品品质改良技术研究重点实验室;
【基金】：国家自然科学基金资助项目(31201658;31101539) 浙江省自然科学基金资助项目(LY15C150006;Y3110308) 浙江农林大学科研发展基金人才启动项目(2011FR018)
【分类号】：S423;S642.2
，
本文编号：2512192
文内图片：
图片说明：干旱胁迫对黄瓜根尖显微结构的影响
[Abstract]:In order to study the effects of drought stress on the tissue and cell structure of vegetative organs of cucumber Cucumis sativus seedlings, 'Jinyou 1' Jinyou No.1' cucumber seedlings were used as test materials to simulate drought stress by adding 5% and 10% polyethylene glycol (PEG-6000) to the nutrient solution, respectively. The results showed that with the increase of drought stress, the change of tissue structure of cucumber seedlings was gradually aggravated. Under the treatment of 5% PEG-6000, the parenchyma cells in root cortex decreased, the xylem ducts atrophied and the palisade tissue arranged more closely, while under the treatment of 10% PEG-6000, the tissues and cells of cucumber seedlings were seriously deformed, atrophied, arranged disordered and epidermis ruptured. The results showed that cucumber adapted to mild drought stress through a certain degree of tissue structure change, but the tissue structure was seriously damaged under severe drought stress, which eventually led to the loss of organ, tissue or cell function.
【作者单位】： 浙江农林大学农业与食品科学学院;浙江农林大学浙江省农产品品质改良技术研究重点实验室;
【基金】：国家自然科学基金资助项目(31201658;31101539) 浙江省自然科学基金资助项目(LY15C150006;Y3110308) 浙江农林大学科研发展基金人才启动项目(2011FR018)
【分类号】：S423;S642.2
，
本文编号：2512192
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