Salt tolerance of wild rice Oryza latifolia Desv. in relation to growth and dry matter production
| Accession number;05A0364412 |
| Title;Salt tolerance of wild rice Oryza latifolia Desv. in relation to growth and dry matter production |
| Author;NAKAMURA ICHIRO(Univ. of Ryukyus) AGARIE SAKAE(Saga Univ., Fac. Agriculture, JPN) MURAYAMA SEIICHI(Univ. of Ryukyus) TOBITA SATOSHI(Japan International Res. Center Agricultural Sci., JPN) YANAGIHARA SEIJI(Kokusaiineken) KAWAMITSU YOSHINOBU(Univ. of Ryukyus) MOTOMURA KEIJI(Univ. of Ryukyus) |
Journal Title;Japanese Journal of Tropical Agriculture
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Journal Code:F0874A
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ISSN:0021-5260
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VOL.49;NO.1;PAGE.70-76(2005)
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| Figure&Table&Reference;FIG.4, TBL.2, REF.21 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;To examine the salt tolerance of the wild rice species Oryza latifolia Desv., we compared the dry matter production and photosynthesis of this species with those of the salt-susceptible wild rice species O. rufipogon Griff., salt-tolerant O. sativa cultivar (SR26B), and susceptible O. sativa cultivar (IR28). The survival rate and dry matter production of O. latifolia were higher than those of the other species grown in water-culture with 6dSm'-1' (50mM) and 12dSm'-1' (113mM) NaCl for 30 days. In O. latifolia, root growth was impaired with NaCl whereas in the other species, the leaf function was impaired. The leaves showed a high water retentivity based on the differences in weight between dry matter and fresh tissues. The photosynthetic rate of the stressed-leaves grown with 12dSm'-1' NaCl decreased by 10%, 18%, and 18% in IR28, SR26B, and O. rufipogon, respectively, whereas it remained unchanged in O. latifolia. These results indicated that O. latifolia is endowed with mechanisms for the maintenance of stomatal aperture in the salt-stressed leaves and salt tolerance in the photosynthetic organs, which may account for the reduced impairment of dry matter production under salt stress. (author abst.) |
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