High temperature stress and spikelet fertility in rice (Oryza sativa L.).

By S. Jagadish, Peter Craufurd, Tim Wheeler. Journal of Experimental Botany, 2007

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In future climates, greater heat tolerance at anthesis will be required in rice. The effect of high temperature at anthesis on spikelet fertility was studied on IR64 (lowland indica) and Azucena (upland japonica) at 29.6 degrees C (control), 33.7 degrees C, and 36.2 degrees C tissue temperatures. The objectives of the study were to: (i) determine the effect of temperature on flowering pattern; (ii) examine the effect of time of day of spikelet anthesis relative to a high temperature episode on spikelet fertility; and (iii) study the interactions between duration of exposure and temperature on spikelet fertility. Plants were grown at 30/24 degrees C day/night temperature in a greenhouse and transferred to growth cabinets for the temperature treatments. Individual spikelets were marked with paint to relate fertility to the time of exposure to different temperatures and durations. In both genotypes the pattern of flowering was similar, and peak anthesis occurred between 10.30 h and 11.30 h at 29.2 degrees C, and about 45 min earlier at 36.2 degrees C. In IR64, high temperature increased the number of spikelets reaching anthesis, whereas in Azucena numbers were reduced. In both genotypes<or=1 h exposure to>or=33.7 degrees C at anthesis caused sterility. In IR64, there was no interaction between temperature and duration of exposure, and spikelet fertility was reduced by about 7% per degrees C>29.6 degrees C. In Azucena there was a significant interaction and spikelet fertility was reduced by 2.4% degrees Cd-1 above a threshold of 33 degrees C. Marking individual spikelets is an effective method to phenotype genotypes and lines for heat tolerance that removes any apparent tolerance due to temporal escape.

Subfields: Ecology, Evolution, Behavior and Systematics, Genetics, Plant Science

View Paper: https://www.semanticscholar.org/paper/da288ccb35ae9955497954a93aa075d9161193fc

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Citations in the corpus

The effect of high temperature stress on male and female reproduction in plants (2015, background): “The timing of this process relative to floret opening and sensitivity of this process to HT explains why florets experiencing HTs 1 h prior to flower opening are detrimental to seed set in rice (Satake and Yoshida, 1978; Jagadish et al., 2007).”
Global synthesis of drought effects on cereal, legume, tuber and root crops production: A review (2017, background): “Most crops were more sensitive to heat stress during their reproductive phase to an extent that yield reduction was unrecoverable due to flower sterility in rice (Jagadish et al., 2007), wheat (Barnábas et al.”
Consequences of high temperature under changing climate optima for rice pollen characteristics-concepts and perspectives (2018, background): “The temperature above 35°C at reproductive stage lasting for more than an hour resulted in maximum spike sterility (Jagadish et al. 2007; Rang et al. 2011).”
High-Temperature Effects on Rice Growth, Yield, and Grain Quality (2011, background): “08 Jagadish et al. (2007)”
Impact of high-temperature stress on rice plant and its traits related to tolerance (2011, background): “In greenhouse experiments with both indica and japonica genotypes, Jagadish et al. (2007) found that less than 1 h of exposure to temperatures above 33·7 °C was sufficient to induce sterility.”
Spikelet Proteomic Response to Combined Water Deficit and Heat Stress in Rice (Oryza sativa cv. N22) (2011, methodology): “Stigmas were dissected out and in vivo pollen count and pollen germination were recorded using aniline blue stain according to Jagadish et al. (2010). Pollen grains with tubes longer than their diameter were considered as germinated (Luza et al.”
Sensitivity of Grain Sorghum to High Temperature Stress during Reproductive Development (2008, neutral): “Short periods (1 to 6 d) of HT stress at fl owering can cause signifi cant decreases in seed numbers and seed yield in rice (Oryza sativa L.) (Jagadish et al., 2007) and peanut (Arachis hypogaea L.) (Prasad et al., 2001).”
Sensitivity of flowering plant gametophytes to temperature fluctuations (2011, background): “…sativa L.), initiated in the 1970s by Japanese researchers (Nishiyama, 1984; Satake and Hayase, 1970) and later confirmed by many authors (e.g. Jagadish et al., 2007; Mamun et al., 2006; Prasad et al., 2006), relating chilling and heat stress during booting (early gametophyte development) and…”
Genetic analysis of heat tolerance at anthesis in rice (2010, methodology): “The phenotyping method used in the this paper, namely marking individual spikelets as they anthese at high temperature to exclude escapees ( Jagadish et al., 2007), is a robust and repeatable method to screen for heat tolerance in rice, and one that could be adapted for other crop species.”
Effect of varying high temperatures during reproductive growth on reproductive function, oxidative stress and seed yield in chickpea genotypes differing in heat sensitivity (2013, background): “2008), (5) the absence of pollen on stigma surface and loss of stigma receptivity (Jagadish et al. 2007), (6) loss of ovule function (Gross and Kigel 1994), (7) impaired fertilization (Dupuis and Dumas 1990), (8) limited embryogenesis (Zinn et al.”
Meta-analysis and dose-response analysis of high temperature effects on rice yield and quality (2017, background): “The genotype-dependent response of seed set percentage to high temperatures is observed in many studies (Jagadish et al., 2010a, 2007; Maruyama et al., 2013 Ziska and Ordonez, 1996).”