caa a22 4500 445841877 CHVBK 20180317145347.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s10725-011-9602-1 doi (NATIONALLICENCE)springer-10.1007/s10725-011-9602-1 Effects of the exogenous application of auxin and cytokinin on carbohydrate accumulation in grains of rice under salt stress [Elektronische Daten] [Majid Ghorbani Javid, Ali Sorooshzadeh, Seyed Modarres Sanavy, Iraj Allahdadi, Foad Moradi] Phytohormones, such as auxin and cytokinin, are known to be involved in the regulation of plant responses to salinity stress and counteract the adverse effect of stress conditions. This work investigated the effects of the exogenous spraying of indole-3-acetic acid (IAA) and kinetin (KIN) during the reproductive phase on grain yield by examining the 1000-grain weight and filled-grain percentage as well as the changes in starch, total soluble sugars, sucrose, glucose and fructose concentrations in the grains of two rice cultivars under salt stress. The results indicated that the applied IAA and KIN led to an increased grain yield, 1000-grain weight and filled-grain percentage for both rice cultivars under salt stress. The storage starch content in the grain of the salt-sensitive cultivar was more than that in the salt-tolerant cultivar under IAA application compared with KIN, whereas a decrease in the total soluble sugar content was observed with both IAA and KIN treatments, in comparison to the non-hormone treatment. Interestingly, this study showed that IAA led to a much higher increase in the sucrose content in grain, as compared to the KIN. Furthermore, this experiment suggests that glucose and fructose may play important roles during salt stress because there were clearly higher concentrations of these sugars in the grain of the stressed cultivars under IAA and KIN application: it appears that their accumulation was the earliest response detected during the grain-filling period in rice. Finally, this work indicated that an increase in the rice grain yield, 1000-grain weight and filled-grain percentage are associated with an increase in the contents of starch, sucrose, glucose and fructose in grain caused by the application of IAA and KIN. Springer Science+Business Media B.V., 2011 Auxin nationallicence Carbohydrates nationallicence Cytokinin nationallicence Indole-3-acetic acid nationallicence Kinetin nationallicence Rice nationallicence Salt stress nationallicence Ghorbani Javid Majid Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran aut Sorooshzadeh Ali Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran aut Modarres Sanavy Seyed Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran aut Allahdadi Iraj Department of Agronomy and Plant Breeding, College of Abureyhan, University of Tehran, Tehran, Iran aut Moradi Foad Department of Molecular Physiology, Agricultural Biotechnology Research Institute of Iran, P. O. Box 31535-1897, Karaj, Iran aut Plant Growth Regulation Springer Netherlands 65/2(2011-11-01), 305-313 0167-6903 65:2<305 2011 65 10725 https://doi.org/10.1007/s10725-011-9602-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10725-011-9602-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ghorbani Javid Majid Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran aut NATIONALLICENCE 700 1- Sorooshzadeh Ali Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran aut NATIONALLICENCE 700 1- Modarres Sanavy Seyed Department of Agronomy, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran aut NATIONALLICENCE 700 1- Allahdadi Iraj Department of Agronomy and Plant Breeding, College of Abureyhan, University of Tehran, Tehran, Iran aut NATIONALLICENCE 700 1- Moradi Foad Department of Molecular Physiology, Agricultural Biotechnology Research Institute of Iran, P. O. Box 31535-1897, Karaj, Iran aut NATIONALLICENCE 773 0- Plant Growth Regulation Springer Netherlands 65/2(2011-11-01), 305-313 0167-6903 65:2<305 2011 65 10725 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer