caa a22 4500 397522657 CHVBK 20180308164637.0 cr unu---uuuuu 161202e199512 xx s 000 0 eng 10.1093/jxb/46.12.1843 doi (NATIONALLICENCE)oxford-10.1093/jxb/46.12.1843 Changes in plant response to NaCl during development of rice (Oryza sativa L.) varieties differing in salinity resistance [Elektronische Daten] [S. Lutts, J.M. Kinet, J. Bouharmont] The effects of NaCl stress on growth and development of rice {Oryza sativa L.) were studied and compared in varieties of various origins. During the vegetative stage, tall indica landraces (Nona Bokra, Buhra Rata, Panwell, and Pokkali) appeared to be resistant throughout while in japonica varieties (I Kong Pao (IKP) and Tainung 67) and elite breeding lines (IR 4630, IR 2153 and IR 31785), resistance fluctuated. Panwell, which was the only indica variety evaluated during the reproductive stage, also expressed salt resistance during booting, heading and grain maturation while varieties with the greatest variability in salt stress response during the vegetative phase (IR 4630, IR 31785 and IKP) also showed the greatest variability during reproductive development. Thus, varietal levels of resistance to salinity at different growth stages are not necessarily interdependent characteristics. Variability in salt resistance of different genotypes during the vegetative and reproductive phases of development was not correlated to their mean level of relative resistance. There was an ontogenic evolution of salt resistance and the young seedling stage appeared to be the most sensitive to NaCI during vegetative growth. Nevertheless, short- and middle term effects of stress have to be distinguished for each genotype since some varieties showed better growth during the second week of stress than during the first, whilst others showed an opposite trend. Moreover, even at specific stages of development, plant responses to NaCI were quite variable according to the criterion used to quantify salinity resistance. The identification of genotypes resistant to NaCI at specific developmental stages is essential to improve the understanding of the effects of salt stress upon phenology and to elaborate further breeding programmes. © Oxford University Press Research Papers nationallicence Rice nationallicence Oryza sativa L nationallicence salt resistance nationallicence NaCl nationallicence phenology nationallicence Lutts S. Laboratoire de Cytogéné tique, Université Catholique de Louvain, 5 (Bte 13) Place Croix du Sud, B-1348 Louvain-la-Neuve, Belgium aut Kinet J.M. Laboratoire de Cytogéné tique, Université Catholique de Louvain, 5 (Bte 13) Place Croix du Sud, B-1348 Louvain-la-Neuve, Belgium aut Bouharmont J. Laboratoire de Cytogéné tique, Université Catholique de Louvain, 5 (Bte 13) Place Croix du Sud, B-1348 Louvain-la-Neuve, Belgium aut Journal of Experimental Botany Oxford University Press 46/12(1995-12), 1843-1852 0022-0957 46:12<1843 1995 46 exbotj https://doi.org/10.1093/jxb/46.12.1843 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/jxb/46.12.1843 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lutts S. Laboratoire de Cytogéné tique, Université Catholique de Louvain, 5 (Bte 13) Place Croix du Sud, B-1348 Louvain-la-Neuve, Belgium aut NATIONALLICENCE 700 1- Kinet J.M. Laboratoire de Cytogéné tique, Université Catholique de Louvain, 5 (Bte 13) Place Croix du Sud, B-1348 Louvain-la-Neuve, Belgium aut NATIONALLICENCE 700 1- Bouharmont J. Laboratoire de Cytogéné tique, Université Catholique de Louvain, 5 (Bte 13) Place Croix du Sud, B-1348 Louvain-la-Neuve, Belgium aut NATIONALLICENCE 773 0- Journal of Experimental Botany Oxford University Press 46/12(1995-12), 1843-1852 0022-0957 46:12<1843 1995 46 exbotj Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford