Resilience of rice (Oryza spp.) pollen germination and tube growth to temperature stress

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cg.contributor.affiliationUniversity of Readingen
cg.contributor.affiliationInternational Rice Research Instituteen
cg.identifier.doihttps://doi.org/10.1111/pce.12475en
cg.issn0140-7791en
cg.issue1en
cg.journalPlant, Cell & Environmenten
cg.volume39en
dc.contributor.authorCoast, Onoriodeen
dc.contributor.authorMurdoch, Alistair J.en
dc.contributor.authorEllis, Richard H.en
dc.contributor.authorHay, Fiona R.en
dc.contributor.authorJagadish, Krishna S.V.en
dc.date.accessioned2024-12-19T12:55:03Zen
dc.date.available2024-12-19T12:55:03Zen
dc.identifier.urihttps://hdl.handle.net/10568/165423
dc.titleResilience of rice (Oryza spp.) pollen germination and tube growth to temperature stressen
dcterms.abstractResilience of rice cropping systems to potential global climate change will partly depend on the temperature tolerance of pollen germination (PG) and tube growth (PTG). Pollen germination of high temperature‐susceptible Oryza glaberrima Steud. (cv. CG14) and Oryza sativa L. ssp. indica (cv. IR64) and high temperature‐tolerant O. sativa ssp. aus (cv. N22), was assessed on a 5.6–45.4 °C temperature gradient system. Mean maximum PG was 85% at 27 °C with 1488 μm PTG at 25 °C. The hypothesis that in each pollen grain, the minimum temperature requirements (Tn) and maximum temperature limits (Tx) for germination operate independently was accepted by comparing multiplicative and subtractive probability models. The maximum temperature limit for PG in 50% of grains (Tx(50)) was the lowest (29.8 °C) in IR64 compared with CG14 (34.3 °C) and N22 (35.6 °C). Standard deviation (sx) of Tx was also low in IR64 (2.3 °C) suggesting that the mechanism of IR64's susceptibility to high temperatures may relate to PG. Optimum germination temperatures and thermal times for 1 mm PTG were not linked to tolerating high temperatures at anthesis. However, the parameters Tx(50) and sx in the germination model define new pragmatic criteria for successful and resilient PG, preferable to the more traditional cardinal (maximum and minimum) temperatures.en
dcterms.available2015-02-14
dcterms.bibliographicCitationCoast, Onoriode; Murdoch, Alistair J.; Ellis, Richard H.; Hay, Fiona R. and Jagadish, Krishna S.V. 2016. Resilience of rice (Oryza spp.) pollen germination and tube growth to temperature stress. Plant Cell and Environment, Volume 39 no. 1 p. 26-37en
dcterms.extentpp. 26-37en
dcterms.issued2016-01
dcterms.languageen
dcterms.licenseCopyrighted; all rights reserved
dcterms.publisherWileyen
dcterms.subjectclimatic changeen
dcterms.subjectclimatic factorsen
dcterms.subjectgerminationen
dcterms.subjectoryza glaberrimaen
dcterms.subjectpollen temperatureen
dcterms.typeJournal Article

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