Cleistogamy Decreases the Effect of High Temperature Stress at Flowering in Rice

Koike, Setsuo; Yamaguchi, Tomoya; Ohmori, Shinnosuke; Hayashi, Takami; Yatou, Osamu; Yoshida, Hitoshi

doi:10.1626/pps.18.111

Cited by 22 publications

(19 citation statements)

References 16 publications

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“…This phenomenon has been observed in some commercial rice varieties (Li, 1988; Das et al, 2014). Koike et al (2015) generated a temperature-inducible cleistogamous rice mutant and found that cleistogamy was advantageous to rice pollination and fertilization at high temperatures. However, the hybrid rice seed production system is entirely dependent on cross-pollination between a male sterile line and a restorer line.…”

Section: Discussionmentioning

confidence: 99%

“…We also observed that Guangzhan 63S had abundant vascular tissues in lodicules, which is in contrast to II-32A, which had a low abundance of vascular tissues and a broader flowering time. Thus, abundant vascular tissues in lodicules may be a favorable trait for high-temperature tolerance in conventional rice varieties as it could close the glume quickly in response to higher temperature to protect the stamen (Li, 1988; Koike et al, 2015). However, this trait becomes unfavorable for hybrid seed production as glume closure prevents outcrossing pollination.…”

Section: Discussionmentioning

confidence: 99%

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High Temperature Induced Glume Closure Resulted in Lower Fertility in Hybrid Rice Seed Production

Yan

Zhang

et al. 2017

Front. Plant Sci.

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Predicted climate changes, in particular, the increased dimension and frequency of heat waves, are expected to affect crop growth in the future seriously. Hybrid rice relies on seed production from male sterile and restorer lines. Experiments were conducted over two consecutive years to compare the high temperature tolerance of parents of different hybrid rice combinations, in terms of fertility rate, flowering pattern, pollination and physiological parameters of the lodicule. Three male sterile lines and a broad compatibility restorer line (as pollen donor and conventional variety as well) were grown to heading stage and then treated with average daily temperatures of 26°C (range 23–30°C), 28°C (25–32°C), and 30°C (26–34°C), respectively, continued for 5–7 days each in a natural light phytotron which simulated the local typical high temperature weather in the field. The results indicated that male sterile lines were more sensitive to high temperature than the restorer line for fertility rate, and the sensitivity varied between varieties. The fertility rate of the restorer line was maintained at about 90% under the high temperature treatments, while it decreased in the male sterile lines by 23.3 and 48.1% at 28 and 30°C, respectively. The fertility rate of the most sensitive line declined by 70%, and the tolerant line declined by 34% at 30°C. Glume closure in the male sterile lines was a major reason for the reduced fertility rate under high temperature, which is closely correlated with carbohydrates content and the vascular bundle pattern in the lodicule. The present study identified a useful trait to select male sterile lines with high temperature tolerance for seed production.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

High Temperature Induced Glume Closure Resulted in Lower Fertility in Hybrid Rice Seed Production

Yan

Zhang

et al. 2017

Front. Plant Sci.

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“…The occurrence of closed flowers and, therefore, with assured fertilization, is associated with unfavorable environmental conditions related to light, humidity, temperature and other limiting factors (e.g. Koike et al 2015). Finally, complete cleistogamy (3) is the production of closed flowers only, being the less common type.…”

Section: Cleistogamymentioning

confidence: 99%

Towards a unified terminology for angiosperm reproductive systems

et al. 2018

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Angiosperms display an enormous diversity of forms, functions and strategies when it comes to reproduction. This multiplicity has been translated into several terminological concepts and contexts, which have facilitated further research. On the other hand, the use of terms that address the reproduction of flowering plants has been shown to be inconsistent in the literature, complicating communication among specialists. Key terms, such as "reproductive system", "mating system" and "sexual system", among others, have been frequently cited as synonyms, and even used in different circumstances. This review proposes to establish a consistent nomenclatural classification in the field of angiosperms reproductive biology in order to facilitate communication among researchers. Specific terms related to angiosperm reproduction are conceptualized and distributed into five general systems: four related to sexual reproduction (sexual, floral, incompatibility and mating systems); and one related to asexual reproduction (apomictic systems). Our proposal is not to establish a natural classification, but rather to provide a general overview of the main concepts that were grouped here in an artificial and functional manner. Our aim is to advance the field of reproductive biology of angiosperms with consistent and well-defined applications of relevant terminologies.

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“…Indeed, environmental conditions affect successful pollination of crops. In this study, favourable environmental conditions such as low temperature and high humidity which are usually recorded during the early hours of the day may have accounted for the comparatively higher crossability success during this period (Koike et al, 2015).…”

Section: Variation In Crossability Success With Respect To Time Of Daymentioning

confidence: 64%

Crossability Studies among Twenty Accessions of Roselle (Hibiscus sabdariffa L.)

Kwofie¹,

Amoatey²,

Nunekpeku³

et al. 2017

JAS

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Increasing exploitation of roselle (Hibiscus sabdariffa L.) and its products require that commercial varieties with superior attributes are developed to replace landrace varieties and to meet the growing demand for commercial-scale cultivation of the crop. In this study, twenty landrace varieties of roselle collected from three geographical regions of Ghana were artificially crossed in a pairwise mating scheme. The aim was to obtain relevant information pertaining to fertility status and extent of crossability among the accessions to facilitate breeding of improved varieties. Attempts at hybridisation were made both between and among 6 accessions of Hibiscus sabdariffa var Altissima and 14 accessions of Hibiscus sabdariffa var Sabdariffa. Crosses between accessions of Hibiscus sabdariffa var Altissima and Hibiscus sabdariffa var Sabdariffa yielded no hybrids, suggestive of a crossability barrier between the two mating groups. All intra-varietal crosses involving accessions of Hibiscus sabdariffa var Altissima were successful regardless of direction of cross while only few of the crosses among those of Hibiscus sabdariffa var Sabdariffa produced successful hybrids. Also fertility estimates of members of Hibiscus sabdariffa var Altissima were significantly higher (30.00%-80.00%) compared to those of var Sabdariffa (0.00%-43.00%). This implies that complete pairwise design could be used for intra-varietal crosses involving accessions of Hibiscus sabdariffa var Altissima, whereas only a partial pairwise design is feasible for members of Hibiscus sabdariffa var Sabdariffa.

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Cleistogamy Decreases the Effect of High Temperature Stress at Flowering in Rice

Cited by 22 publications

References 16 publications

High Temperature Induced Glume Closure Resulted in Lower Fertility in Hybrid Rice Seed Production

High Temperature Induced Glume Closure Resulted in Lower Fertility in Hybrid Rice Seed Production

Towards a unified terminology for angiosperm reproductive systems

Crossability Studies among Twenty Accessions of Roselle (Hibiscus sabdariffa L.)

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