Melatonin promotes water‐stress tolerance, lateral root formation, and seed germination in cucumber (<i>Cucumis sativus</i> L.)

Journal of Pineal Research - Tập 54 Số 1 - Trang 15-23 - 2013
Na Zhang1, Bing Zhao2, Haijun Zhang2, Sarah Weeda3, Chen Yang2, Zi‐Cai Yang2, Shuxin Ren3, Yang‐Dong Guo2
1College of Agriculture and Biotechnology, China Agricultural University, Beijing, China School of Agriculture, Virginia State University, Petersburg, VA, USA.
2College of Agriculture and Biotechnology, China Agricultural University, Beijing, China
3School of Agriculture, Virginia State University, Petersburg, VA, USA

Tóm tắt

Abstract:  A comprehensive investigation was carried out to determine the changes that occurred in water‐stressed cucumber (Cucumis sativus L.) in response to melatonin treatment. We examined the potential roles of melatonin during seed germination and root generation and measured its effect on reactive oxygen species (ROS) levels, antioxidant enzyme activities, and photosynthesis. Melatonin alleviated polyethylene glycol induced inhibition of seed germination, with 100 μm melatonin‐treated seeds showing the greatest germination rate. Melatonin stimulated root generation and vitality and increased the root:shoot ratio; therefore, melatonin may have an effect on strengthening cucumber roots. Melatonin treatment significantly reduced chlorophyll degradation. Seedlings treated with 100 μm melatonin clearly showed a higher photosynthetic rate, thus reversing the effect of water stress. Furthermore, the ultrastructure of chloroplasts in water‐stressed cucumber leaves was maintained after melatonin treatment. The antioxidant levels and activities of the ROS scavenging enzymes, i.e., superoxide dismutase, peroxidase, and catalase, were also increased by melatonin. These results suggest that the adverse effects of water stress can be minimized by the application of melatonin.

Từ khóa


Tài liệu tham khảo

10.1111/j.1600-079X.1995.tb00136.x

Hattori A, 1995, Identification of melatonin in plants and its effects on plasma melatonin levels and binding to melatonin receptors in vertebrates, Biochem Mol Biol Int, 35, 627

10.1111/j.1600-079X.2005.00276.x

10.1111/j.1600-079X.2011.00856.x

10.1007/BF01923945

10.1007/BF01134354

10.1007/BF00196659

Tan DX, 1993, Melatonin: a potent, endogenous hydroxyl radical scavenger, Endocr J, 1, 57

10.1034/j.1600-079X.2003.02111.x

10.1111/j.1600-079X.2006.00407.x

10.1159/000121862

10.1111/j.1600-079X.2011.00915.x

10.1111/j.1600-079X.2009.00729.x

10.1016/S0024-3205(00)00896-1

10.1111/j.1600-079X.2007.00552.x

10.1111/j.1600-079X.2008.00652.x

10.1111/j.1600-079X.2011.00947.x

10.1111/j.1600-079X.2010.00783.x

10.1111/j.1600-079X.2010.00817.x

10.1034/j.1399-3054.2003.00114.x

10.1016/S0031-9422(96)00568-7

10.1111/j.1600-079X.2009.00711.x

Wang P, 2011, Delayed senescence of apple leaves by exogenous melatonin treatment: toward regulating the ascorbate–glutathione cycle, J Pineal Res

10.1111/j.1600-079X.2008.00660.x

10.1007/s10725-008-9254-y

10.1111/j.1600-079X.2005.00226.x

10.1046/j.1600-079X.2003.00106.x

10.1016/S0098-8472(98)00018-5

10.1104/pp.91.2.766

10.1111/j.1365-3040.1995.tb00351.x

10.1104/pp.67.1.64

10.1016/j.ecoenv.2008.04.024

10.1016/0167-7799(96)80929-2

10.1159/000014635

10.1007/s002990000206

10.1007/BF00009293

10.1007/s004250050524

10.1016/S0168-9452(98)00025-9

10.1104/pp.59.3.411

10.1002/9780470110546.ch2

10.1016/0003-2697(76)90527-3

10.1104/pp.59.2.309

10.1139/b87-097

10.1023/A:1017962102950

10.1146/annurev.pp.24.060173.002511

10.1111/j.1600-079X.2008.00625.x

Demmigadams B, 1992, Photoprotection and other responses of plants to high light stress, Annu Rev Plant Physiol, 43, 599, 10.1146/annurev.pp.43.060192.003123

10.1104/pp.126.3.1024

10.1016/0891-5849(88)90043-3

10.1111/j.1600-079X.2006.00396.x

Ramon PF, 2012, Melatonin regulates Arabidopsis root system architecture likely acting independently of auxin signaling, J Pineal Res

10.1016/j.jplph.2008.06.002

10.1111/j.1600-079X.2011.00914.x

10.1111/j.1399-3054.1996.tb00457.x

10.1006/bbrc.1998.9826

10.18388/abp.2007_3264

10.1016/S0301-0082(98)00052-5

10.1016/S0891-5849(00)00435-4

10.1111/j.1600-079X.2011.00931.x

10.1111/j.1600-079X.2011.00916.x

10.1007/s10725-005-0002-2

10.1046/j.1600-079X.2003.00092.x

10.1093/jxb/err256