Growth and development of cotton (Gossypium hirsutum L.) in response to CO2 enrichment under two different temperature regimes |
| |
| Authors: | ST Yoon Gerrit Hoogenboom Ian Flitcroft Mohammad Bannayan |
| |
| Institution: | 1. Department of Biological and Agricultural Engineering, The University of Georgia, Griffin, GA 30223-1797, USA;2. College of Bio-Resources Science, Dankook University, Cheonan 330-714, Republic of Korea;3. Department of Crop and Soil Sciences, The University of Georgia, Griffin, GA 30223-1797, USA;4. Ferdowsi University of Mashhad, Faculty of Agriculture, P.O. Box 91775-1163 Mashhad, Iran;1. Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal;2. Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, 2781-901 Oeiras, Portugal;1. CSIC, Global Ecology Unit, CREAF-CEAB-CSIC-Universitat Autònoma de Barcelona, Cerdanyola del Vallés (Catalonia), E-08193, Spain;2. CREAF, Cerdanyola del Vallès (Catalonia), E-08193, Spain,;3. Department of Environmental Sciences, Faculty of Sciences, University of Girona, Campus de Montilivi s/n, E-17071 Girona, Spain;4. Key Laboratory of Horticulture Science for Southern Mountainous Regions, Ministry of Education, Southwest University, Chongqing 400716, China;1. Plant and Soil Science Section, Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark;2. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;1. Grupo de Fisiología del Estrés en Plantas (Dpto. de Biología Ambiental), Unidad Asociada al CSIC, EEAD, Zaragoza e ICVV, Logroño, Facultades de Ciencias y Farmacia, Universidad de Navarra, Irunlarrea 1, 31008 Pamplona, Spain;2. Instituto de Agrobiotecnología (IdAB), Universidad Pública de Navarra-CSIC-Gobierno de Navarra, Campus de Arrosadía, 31192 Mutilva Baja, Spain;3. Plant Biology and Ecology Department, Science and Technology Faculty, University of the Basque Country, Barrio Sarriena sn, 48940 Leioa, Bizkaia, Spain;4. Unidad de Fisiología Vegetal, Universidad de Barcelona, Av. Diagonal 645, 08028, Spain;5. Dpto. de Nutrición Vegetal, Estación Experimental de Aula Dei (EEAD), Consejo Superior de Investigaciones Científicas (CSIC), Apdo. 13034, 50080 Zaragoza, Spain;1. Department of Environmental and Biological Sciences, University of Eastern Finland, 80101 Joensuu, Finland;2. Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences, 1432 Ås, Norway |
| |
| Abstract: | An increase in atmospheric CO2 concentration (CO2]) together with other climate change factors could greatly affect agricultural productivity. Understanding the impact of the change in atmospheric CO2] in conjunction with the ongoing global change is crucial to prepare for mitigation and any adaptation for future agricultural production. The main goal of this project was to study the time-course pattern of cotton plant growth in response to CO2] and temperature to investigate the hypothesis that whether response to elevated CO2] would change at different temperatures. An experiment was conducted in the controlled-environment chambers of the Georgia Envirotron with two different day/night temperatures levels, e.g., 25/15 °C and 35/25 °C, and three CO2 concentrations, e.g., 400, 600 and 800 μmol l?1. The experimental design was completely randomized with four replicates (plastic containers) per treatment. Growth analysis was conducted at bi-weekly intervals during the growing season. In addition, leaf area, leaf dry mass, root dry mass, square dry mass, boll dry mass and total above dry mass per plant were also measured at each sampling. Plant traits, including plant height, number of leaves, number of squares and number of bolls were recorded weekly. The number of days to emergence, squaring, flowering and maturity were also observed. The results showed that by increasing CO2] to 600 μmol l?1 total biomass increased at both temperature levels, but a further increase of CO2] up to 800 μmol l?1 increased total biomass only at the temperature of 35/25 °C. Throughout the growing season, there was no significant effect of CO2] levels on LAI. Increasing temperature from 25/15 °C to 35/25 °C had a positive impact on LAI across all CO2 levels (P < 0.05). Increasing CO2 from 400 to 600 μmol l?1 significantly increased the number of squares by 31.4%, but a further increase to 800 μmol l?1 caused a 6.6% decrease (non-significant) in the number of squares. The interactive effects of CO2] and temperature indicated that at a higher temperature, CO2 would be more beneficial as we proceed towards the end of the growing season. However, further studies are needed to really understand the interaction between higher CO2] and temperature levels and cultivar characteristics. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
