Study on Transpiration and Stomatal Conductance Characteristics of C3 and C4 Plant
The transpiration experiment was done under greenhouse conditions with a C3 plant sweet pepper(Capsicum annuum Linn.)and two C4 plants,sorghum(Sorghum bicolor L.Moench)and maize(Zea mays Linn.).Three species were irrigated with three different water treatment levels of 100%,66%and 33% which gave a comparison of tolerance and adaptation to irrigation and two different levels of water stress.The measurements of transpiration rate and stomatal conductance were done between 8.00 a.m.and 16.00 p.m.with measurements about each 1.5 h with an infrared gas analyzer.The results showed that Z. mays probably due to a hiigher leaf area had very low values and was significantly different(LSD pairwise comparison)from C. annuum and S.bicolor.The hypotheses that C4 plants and C3 plants have different transpiration rates and stomatal conductance could not be shown with the results.However,the hypotheses that for the same species,the highest values in transpiration rate and stomatal conductance were with the 100% irrigation treatment and the lowest values were with the 33% irrigation treatment could be accepted due to the results of this trial.
作 者： MENG Jinghui LU Yuanchang Ronald Kühne LIU Gang 作者单位： MENG Jinghui(Resource and Information Institute,Chinese Academy of Forestry,Beijing 100096,China;Faulty of Forest Sciences and Ecology,Universitity Goettingen,Goettingen 37077,Germany)LU Yuanchang(Resource and Information Institute,Chinese Academy of Forestry,Beijing 100096,China)
Ronald Kühne(Department of Crop Sciences-Tropical Agronomy,Goettingen University,Goettingen 37077,Germany)
LIU Gang(College of Horticulture and Forestry Science,Huazhong Agricultural University,Wuhan 4300702,China)
刊 名： 东北农业大学学报（英文版） 英文刊名： JOURNAL OF NORTHEAST AGRICULTURAL UNIVERSITY(ENGLISH EDITION) 年，卷(期)： 2009 16(4) 分类号： Q945 关键词： transpiration rate stomatal conductance water stress