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榕属4种植物种子萌发对PEG模拟干旱胁迫的响应(PDF)

《西南林业大学学报》[ISSN:2095-1914/CN:53-1218/S]

期数:
2017年04期
页码:
15-21
栏目:
出版日期:
2017-06-30

文章信息/Info

Title:
Seed Germination of 4 Ficus Species Under Drought Stress Simulated by PEG
文章编号:
2095-1914(2017)04-0015-07
作者:
古旭1张锦堂12陈琛12吴华锐12王亮12赵洁3张媛1
1. 西南林业大学云南生物多样性研究院,云南 昆明 650224;
2. 西南林业大学林学院,云南 昆明 650224;
3. 云南省昭通市农业科学院,云南 昭通 657000
Author(s):
Gu Xu1 Zhang Jintang12 Chen Chen12 Wu Huarui12 Wang Liang12 Zhao Jie3 Zhang Yuan1
1. Yunnan Academy of Biodiversity, Southwest Forestry University, Kunming Yunnan 650224, China;
2. College of Forestry, Southwest Forestry University, Kunming Yunnan 650224, China;
3. Zhaotong City Academy of Agricultural Sciences, Zhaotong Yunnan 657000, China
关键词:
榕属抗旱性萌发特性种子PEG胁迫
Keywords:
Ficus drought resistance germination features seed PEG stress
分类号:
S722.36
DOI:
10.11929/j.issn.2095-1914.2017.04.003
文献标识码:
A
摘要:
在0%、5%、10%、20%、25%不同浓度梯度的PEG-4000模拟干旱条件下,测定云南省西双版纳地区的聚果榕、斜叶榕、对叶榕和木瓜榕植物种子的发芽和生长指标,分析4种榕属植物对干旱胁迫的响应及其耐旱性。结果表明:干旱对4种榕树的种子萌发进程有较大影响,木瓜榕和聚果榕的发芽率、发芽势、发芽指数和活力指数这4个萌发指标,随着PEG浓度的升高均显著下降,而斜叶榕和对叶榕的以上指标与PEG浓度无明显相关性;幼苗生长结果表现为斜叶榕的幼苗胚根和胚芽生长与PEG浓度均无相关性,而对叶榕和木瓜榕只有胚根生长与PEG浓度显著相关,聚果榕的胚根、胚芽生长与PEG浓度均显著相关;4种榕属植物在不同测定指标下均表现出极显著的种间差异。因此,不同榕属植物之间抗旱性存在较大差异。
Abstract:
0%, 5%, 10%, 20% and 25% PEG-4000 solutions were used to simulate drought stress conditions for the germination and growth of seedling in 4 Ficus species (Ficus racemosa, F.tinctoria, F.hispida, F.auriculata), which naturally grow in Xishuangbanna, Yunnan, to explore the effect of drought stress and the difference of drought resistance among those 4 species. The results showed that drought has significant effect on the germination process for all species in our experiments. As the water stress aggravated, the germination rate, germination potential, germination index and vigor index all significantly declined for both F.auriculata and F.racemosa, while there was no significant relationship between PEG concentration and above indices for both F.tinctoria and F.hispida. The results of seedling growth showed that the radical and plumule length did not change with PEG concentration in F.tinctoria. For F.hispida and F.auriculata the radical length decreased with the water stress going up, while PEG concentration had significantly adverse effects on both radical and plumule length for F.racemosa. Furthermore, the effect of PEG concentration on different indices was significantly different among species.

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备注/Memo

备注/Memo:
收稿日期:2017-04-21; 修回日期:2017-05-12
基金项目:国家自然科学基金项目 (31560116) 资助;西南林业大学科学研究基金面上项目 (XL21615) 资助。
第1作者:古旭 (1988—),女,硕士,助理实验师。研究方向:生物多样性保护。Email: 675129144@qq.com
通信作者:张媛 (1983-),女,博士,副研究员。研究方向:进化生态学。Email: zygogo@163.com
更新日期/Last Update: