Mechanisms of cytokinin action |
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| Affiliation: | 1. College of Resources and Environment, Yangtze University, Wuhan, China;2. China University of Geosciences, Wuhan 430074, China;3. The University of Melbourne, 3010 Victoria, Australia;1. Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agriculture University, Wuhan, 430070, Hubei, PR China;2. Laboratory of Soil Salinity, Department of Soil Science, Faculty of Agriculture and Environmental Sciences, The Islamia University of Bahawalpur, Bahawalpur, 63100, Punjab, Pakistan;3. Division of Sustainability, Department of Sustainable Environment, Hamad Bin Khalifa University, Education City, Doha, Qatar;4. College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, 430070, PR China;5. Department of Environmental Sciences and Engineering, Government College University Faisalabad, Faisalabad, 38000, Pakistan;6. Department of Biological Sciences and Technology, China Medical University, Taichung, 40402, Taiwan;7. State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Root Biology Center, South China Agricultural University, Guangzhou 510642, PR China;8. College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, Hunan, PR China;1. Research Centre for Plant Growth and Development, School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg Campus, Private Bag X01, Scottsville 3209, South Africa;2. Department of Horticultural Sciences, Faculty of Applied Sciences, Cape Peninsula University of Technology, P.O. Box 1906, Symphony Way, Bellville 7535, Cape Town, South Africa;3. Laboratory of Growth Regulators & Department of Chemical Biology and Genetics, Centre of the Region Haná for Biotechnological and Agricultural Research, Faculty of Science, Palacký University & Institute of Experimental Botany AS CR, Šlechtitelů 11, CZ-783 71 Olomouc, Czech Republic;1. College of Horticulture, Qingdao Agricultural University, Qingdao 266109, P.R.China;2. Haidu College, Qingdao Agricultural University, Laiyang 265200, P.R.China;1. Key Laboratory of Saline-alkali Vegetation Ecology Restoration, Ministry of Education, College of Life Sciences, Northeast Forestry University, Harbin, 150040, China;2. State Key Laboratory of Subtropical Silviculture, Zhejiang A&F University, Lin''an, Hangzhou, 311300, China;3. Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, Hainan, China;4. Qiqihar Eco-environmental Monitoring Center of Heilongjiang Province, Qiqihar, 161005, China;5. College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin, 150030, China |
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| Abstract: | Cytokinins are involved in the control of numerous and important processes associated with plant growthand development. They take part in the control of cell division, chloroplast development, bud differentiation, shoot initiationand growth or leaf senescence. In contrast to the wide knowledge of cytokinin effects, the mechanisms of cytokinin actionremain largely unknown. Therefore, it is still difficult to explain how a group of molecules can control so many different biological responses. In this review, we propose some arguments in order to solve this question. In a first part, we underline that cytokinins act in concert with other signals for the control of biological responses. Therefore, the effects observed in responses to cytokinins would be not only related to cytokinins but would also be dependent on all other environmental and hormonal signals perceived by plant cells. In a second part, we present the different actors which could be involved in the signalling pathways of cytokinins. It is very likely that these different elements could be implicated in different cytokinin signalling pathways. Therefore, we propose that the diversity of the cytokinin responses could be also correlated with a diversity of cytokinin signalling pathways. |
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