Photosynthesis physiology of sexual reproductive Vetiveria zizanioides under simulated light source

Abstract

Abstract: Photosynthetic rate (Pn),stomatal conductance (Gs),transpiration rate (Tr),water use efficiency(WUE) and vapor pressure deficit at the leaf surface (Vpdl) of sexual reproductive Vetiver zizanioides were investigated under artificial simulated light source and different treatments (half-drown and normal treatment).The results showed that the plant under the normal treatment grew better than that under the half-drown,which had much higher Pn,Gs,Tr and WUE than the former.It might be caused by the different growth period and drown stress.The sexual reproductive V.zizanioides had a lower light compensation point,but a higher light saturation point,its Pn still did not reach the maximum when simulated photosyntyhetic radiation(SPR)had been 2 600 μmol·m^-2·s^-1.Compared comprehensively with combined growth parameters,the marks of two treatments were the same,which meant that sexual reproductive V.zizanioides maintained the amphibious characteristic of the parents which made it a euryhydric species and suitable to be planted at wetlands along river bank,reservoir and embankment.

Key words: Tropical rain forest, Endangered species, Photoinhibition, Photosynthetic acclimation, Antioxygenic enzymes, Flexibility

CLC Number:

Q945.11

LIU Jinxiang, LI Wensong, LIU Jiaqiong . Photosynthesis physiology of sexual reproductive Vetiveria zizanioides under simulated light source[J]. cje, 2005, (4): 390-394.

References

[1] 刘金祥,陈燕.2002.我国大陆唯一的大面积成群落分布的优良水土保持植物--香根草的用途与保护问题[J].草业科学,19(7):13～16.
[2] 刘金祥.1989.一种优良水土保持植物--岩兰草[J].世界沙漠研究,(3):48.
[3] 刘金祥,王铭铭,丘明新,等.2003.水分胁迫下光照强度对香根草生理生态的影响[A].中国植物学会七十周年年会论文摘要汇编[C].北京:高等教育出版社,349～350.
[4] 刘家琼,黎志坚,蒲锦春,等.1988.我国沙漠中部地区主要不同生态类型植物脯氨酸的累积、光合呼吸和叶绿素含量[J].植物学报,(30):85～95.
[5] 孙伟,王德利,王立,等.2002.白草(Pennisetum flaccidum)蒸腾特性与水分利用效率对有效光辐射强度和CO2浓度的响应[J].草业科学进展,120～126.
[6] 孙伟,王德利,王立,等.2003.模拟光条件下禾本科植物和藜科植物蒸腾特性与水分利用效率比较[J].生态学报,23(4):814～819.
[7] 杨世杰.2000.植物生物学[M].北京:科学出版社,130～149.
[8] 吴齐强,苏海平.2003.环保"宝贝"研究取得重大突破,湛江种子繁殖香根草成功[N] .人民日报,6～11(1).
[9] 李美茹,王以柔,刘鸿先,等.2001.光照强度调控4种亚热带森林植物叶片的抗氧化能力[J].植物生态学报,25:460～464.
[10] 苏培玺,赵爱芬,张立新,等.2003.荒漠植物梭梭和沙拐枣光合作用、蒸腾作用及水分利用效率特征[J].西北植物学报,23(1):11～17.
[11] 钟声,周自玮.2001.热带亚热带水土保持植物香根草及栽种技术[J].中国草地,23(2):79～80.
[12] 夏汉平,敖惠修,刘世忠.1998.香根草生态工程--实现可持续发展的生物技术[J].生态学杂志,17(6):44～50.
[13] 夏汉平.1997.中国在50年代对香根草的繁殖栽培与管理研究[J].热带作物科技,(5):23～26.
[14] 高维森,张宁,张信宝.1991.香根草引种试验初报[J].中国水土保持,(2):29～31.
[15] 陶战.1992.一种理想的水土保持植物[J].世界农业,(3):49～50.
[16] 傅家瑞,宋松泉,黄上志,等.1998.植物生理学[M].广州:中山大学出版社,66.
[17] 靖元孝,陈兆平,杨丹青.2001.香根草(Vetiveriazizanioides)对淹水的反应和适应初报[J].华南师范大学学报(自然科学版),(4):40～43.
[18] Alan KK. 1993. Gas exchang dybnamics in C₃ and C₄ grasses consequences of differences in stomatal conductance [J]. Ecology, (74) :113～123.
[19] Pearcy RW, Ehleringer J. 1984. Comparative eco-physiology of C₃ and C₄ plants[J]. Plant, Cell Environ., (7): 1～13.