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Effect of simulated flooding during rice seed development and maturation on subsequent seed quality

Tejakhod, S. and Ellis, R. H. (2018) Effect of simulated flooding during rice seed development and maturation on subsequent seed quality. Seed Science Research, 28 (1). pp. 72-81. ISSN 0960-2585

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To link to this item DOI: 10.1017/S0960258517000368


The resilience of seed quality in rice (Oryza sativa L.) to flooding was investigated. Pot-grown plants of the japonica cv. Gleva, the indica cv. IR64, and the introgressed line IR64-Sub1 were submerged in water, to simulate flooding, for 3-5 days at different stages of seed development and maturation. Mean seed weight, pre-harvest sprouting, ability to germinate, and subsequent longevity in air-dry storage were assessed. Whereas seed quality in both IR64 and IR64-Sub1 was resilient to submergence, in Gleva the longer the duration of submergence and the later in development when plants were submerged the greater the pre-harvest sprouting. Thousand seed dry weight was reduced more by submergence in Gleva than IR64 or IR64-Sub1. At harvest maturity, few pre-harvest sprouted seeds were able to germinate upon rehydration after desiccation to 11-12% moisture content. Seed longevity of the non-sprouted seed fraction in air-dry hermetic storage (40 °C, 15% moisture content) was not affected greatly by submergence, but longevity of the japonica rice was less than that of the indica rices due to the former’s steeper seed survival curves. Longevity of the two indica rices was predicted well by the seed viability equation and previously-published estimates of viability constants for rice. The greater dormancy of IR64 and IR64-Sub1, compared to Gleva, enhanced resilience to pre-harvest sprouting and reduced thousand seed dry weight from plant submergence. There was little or no effect of plant submergence on subsequent air-dry storage longevity of non-sprouted seeds in any genotype.

Item Type:Article
Divisions:Life Sciences > School of Agriculture, Policy and Development > Department of Crop Science
ID Code:74520
Uncontrolled Keywords:development, flooding, germination, longevity, Oryza sativa L, pre-harvest sprouting, rice, seed
Publisher:Cambridge University Press


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