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|本期目录/Table of Contents|

半红树植物黄槿的生态生物学特性研究

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2012年02期
页码:
198
栏目:
植物生态学
出版日期:
2012-03-25

文章信息/Info

Title:
Ecological and biological characteristics of Hibiscus tiliaceus, a mangrove associate in China
作者:
张伟伟12 刘楠1 王俊1 任海1 张立敏12 简曙光1*
1.中国科学院 华南植物园, 中国科学院 退化生态系统植被恢复与管理重点实验室, 广州 510650; 2.中国科学院 研究生院, 北京 100049
Author(s):
ZHANG WeiWei12 LIU Nan1 WANG Jun1 REN Hai1 ZHANG LiMin12 JIAN ShuGuang1*
1.Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical garden, Chinese Academy of Sciences, Guangzhou 510650, China; 2.Graduate University of Chinese Academy of Science, Beijing 100049, China
关键词:
黄槿 生态及生物学特性 开发利用
Keywords:
Hibiscus tiliaceus ecological and biological characteristics exploitation and utilization
分类号:
Q948
DOI:
-
文献标识码:
A
摘要:
黄槿是一种具有重要生态、药用和观赏价值的半红树植物,在海岸生态系统中发挥重要作用。对其生态及生物学特性进行研究表明:黄槿属典型阳生性植物,具有较高的光合潜能,适于在热带亚热带地区光照充足的环境中生长。其叶绿素荧光的光合电子传递速率-光响应曲线(RLC)显示,黄槿的相对电子传递速率(rETR)随光合有效辐射(PAR)的升高而逐渐增加,并在PAR 2 751 μmol?m2?s1时达到最大值,说明其光合系统II在强光照下也能保持较高的电子传递效率。黄槿叶绿素荧光参数显示其具有较高的能量利用效率,叶绿素a/b值(2.44∶1)略低于理论值(3∶1)。黄槿对营养元素的利用率较高,植株体内N、P、K、Ca、Na、Mg的加权平均养分含量分别为1.23%、0.23%、1.34%、0.42%、0.24%、0.41%。P含量偏低,在其栽培过程中应及时补充P元素。该研究结果将对黄槿的引种、栽培及开发利用提供重要的理论依据。
Abstract:
Hibiscus tiliaceus is a mangrove associate species with high medicinal,ecological and ornamental values and plays an important role in coastal ecosystem. The study on the ecological and biological characteristics of H.tiliaceus showed that it was a typical heliophyte with high photosynthetic capacity and preferred to grow under sunny condition in tropical and subtropical regions. The chlorophyll fluorescence rapid light response curves of H.tiliaceus showed that relative electron transport rate(rETR)increased with elevated photosynthetically active radiation(PAR)and reached its maximum value at 2 751 μmol?m2?s1,indicating that its photosystem Ⅱ maintained relatively high electron transport rate in high radiation condition. Measurement of chlorophyll fluorescence parameters showed that it had a relatively high level of energy use efficiency. The chlorophyll a/b ratio(2.44∶1) was slightly lower than theoretic value(3∶1). H.tiliaceus had a high level of nutrient utilization efficiency. The weighted nutrient concentrations of N,P,K,Ca,Na and Mg in H.tiliaceus were 1.23%,0.23%,1.34%,0.42%,0.24% and 0.41%,respectively. The concentration of phosphorus(P)in the plant was relatively low,so it should be added in cultivation. The results from the current study would be very useful for introduction,cultivation,exploitation and utilization of H.tiliaceus.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2012-03-25