Evaluation of chilling sensitivity in different rice varieties. Relationship between screening procedures applied during germination and vegetative growth
✍ Scribed by P. Bertin; J. M. Kinet; J. Bouharmont
- Book ID
- 104616217
- Publisher
- Springer
- Year
- 1996
- Tongue
- English
- Weight
- 818 KB
- Volume
- 89
- Category
- Article
- ISSN
- 0014-2336
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✦ Synopsis
Rice varieties were screened for chilling tolerance during germination and vegetative growth using different techniques . The effects of temperature during germination were investigated from 10 to 25 °C . The screening was most effective at 10° C . Time of data collection has to be considered in order to discriminate slow germinating from chilling sensitive varieties . Chilling survival tests (10 °C) applied at the 2-leaf stage revealed that different chilling durations brought complementary results : the longer treatments allowed to identify the most tolerant varieties, while shorter treatments allowed to distinguish intermediate from most sensitive rices . Results of chilling tests applied at the 2-and the 8-leaf stages showed a high correlation . Low-temperature electrolyte leakage and low-temperature fluorescence were also highly correlated to each other and to survival tests applied at the same development stage . By contrast, weak correlations were observed between low-temperature germination and plantlet chilling survival . It is concluded that low-temperature electrolyte leakage and low-temperature fluorescence are good indicators of chilling tolerance during the vegetative growth . The possibility to use a chilling screening procedure applied at this stage in order to predict the chilling tolerance at other development stages is discussed .