Inhibitory effect of eugenol on seed germination and pre-harvest sprouting of hybrid rice (Oryza sativa L.)

Significant variations were obtained among the component lines for most of the floral traits. BRRI9A exhibited superiority for angle of open florets, stigma length and breadth, anther breadth, filament length, style length and panicle exertion rate while its corresponding maintainer lines BRRI9B showed superiority for duration of open florets, stigma length and breadth, anther breadth and filament length. This indicated BRRI9A and its corresponding maintainer line BRRI9B possessed very good floral traits that influence out crossing. Among the restorer lines BR168R showed superiority for duration of open florets, angle of open florets, duration of bloomed florets/panicle, stigma length, anther length and number of pollen/microscopic focus. This suggested BR168R could be used as promising restorer line with BRRI9A for hybrid seed production in local condition.DOI: http://dx.doi.org/10.3329/bjb.v43i1.19739 Bangladesh J. Bot. 43(1): 1-8, 2014 (June)

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AMMI Biplot Analysis for Stability of Grain Yield in Hybrid Rice (Oryza sativa L.)

Rice Research Open Access ◽

10.4172/jrr.1000126 ◽

2014 ◽

Vol 2 (2) ◽

Cited By ~ 9

Author(s):

Anowara Akter ◽

Jamil Hassan M

Keyword(s):

Oryza Sativa ◽

Grain Yield ◽

Hybrid Rice ◽

Oryza Sativa L ◽

Biplot Analysis

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Mechanism of delayed seed germination caused by high temperature during grain filling in rice (Oryza sativa L.)

Scientific Reports ◽

10.1038/s41598-020-74281-9 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Chetphilin Suriyasak ◽

Yui Oyama ◽

Toshiaki Ishida ◽

Kiyoshi Mashiguchi ◽

Shinjiro Yamaguchi ◽

...

Keyword(s):

Oryza Sativa ◽

High Temperature ◽

Seed Germination ◽

Oryza Sativa L ◽

Grain Filling ◽

Aleurone Layer ◽

Gene Promoters ◽

Aba Catabolism ◽

Amylase Genes ◽

Transcriptional Changes

Abstract High temperature during grain filling considerably reduces yield and quality in rice (Oryza sativa L.); however, how high temperature affects seed germination of the next generation is not yet well understood. Here, we report that seeds from plants exposed to high temperature during the grain filling stage germinated significantly later than seeds from unstressed plants. This delay remained even after dormancy release treatments, suggesting that it was not due to primary seed dormancy determined during grain filling. In imbibed embryos of heat-stressed seeds, expression of abscisic acid (ABA) biosynthesis genes (OsNCEDs) was higher than in those of control seeds, whereas that of ABA catabolism genes (OsABA8′OHs) was lower. In the aleurone layer, despite no change in GA signaling as evidenced by no effect of heat stress on OsGAMYB gene expression, the transcripts of α-amylase genes OsAmy1C, OsAmy3B, and OsAmy3E were significantly down-regulated in heat-stressed seeds in comparison with controls. Changes in promoter methylation levels were consistent with transcriptional changes of ABA catabolism-related and α-amylase genes. These data suggest that high temperature during grain filling results in DNA methylation of ABA catabolism-related and α-amylase gene promoters, delaying germination of heat-stressed seeds.

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