The molecular mechanisms of male reproductive organogenesis in rice (Oryza sativa L.)

Tian, Yun; Yang, Hui; Zhang, Hai wen; Dai, Qian; Fang, Jun; Qing, Xian guo; Lü, Xiang

doi:10.1007/s10725-010-9444-2

Cited by 4 publications

(2 citation statements)

References 72 publications

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“…Soon, the generative cell migrates into the cytoplasm of the vegetative cell, where it eventually divides into two sperm cells. The haploid phase ends with the completion of double fertilization (Raghavan, 1989;Itoh et al, 2005;Wilson and Zhang, 2009;Tian et al, 2010;Twell, 2011). The timing of sperm cell formation depends on the plant species.…”

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confidence: 99%

COLLAPSED ABNORMAL POLLEN1Gene Encoding the Arabinokinase-Like Protein Is Involved in Pollen Development in Rice

et al. 2013

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We isolated a pollen-defective mutant, collapsed abnormal pollen1 (cap1), from Tos17 insertional mutant lines of rice (Oryza sativa). The cap1 heterozygous plant produced equal numbers of normal and collapsed abnormal grains. The abnormal pollen grains lacked almost all cytoplasmic materials, nuclei, and intine cell walls and did not germinate. Genetic analysis of crosses revealed that the cap1 mutation did not affect female reproduction or vegetative growth. CAP1 encodes a protein consisting of 996 amino acids that showed high similarity to Arabidopsis (Arabidopsis thaliana) L-arabinokinase, which catalyzes the conversion of L-arabinose to L-arabinose 1-phosphate. A wild-type genomic DNA segment containing CAP1 restored mutants to normal pollen grains. During rice pollen development, CAP1 was preferentially expressed in anthers at the bicellular pollen stage, and the effects of the cap1 mutation were mainly detected at this stage. Based on the metabolic pathway of L-arabinose, cap1 pollen phenotype may have been caused by toxic accumulation of L-arabinose or by inhibition of cell wall metabolism due to the lack of UDP-L-arabinose derived from L-arabinose 1-phosphate. The expression pattern of CAP1 was very similar to that of another Arabidopsis homolog that showed 71% amino acid identity with CAP1. Our results suggested that CAP1 and related genes are critical for pollen development in both monocotyledonous and dicotyledonous plants.

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COLLAPSED ABNORMAL POLLEN1Gene Encoding the Arabinokinase-Like Protein Is Involved in Pollen Development in Rice

et al. 2013

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“…Some rice meiotic genes have been characterized using different technologies (Nonomura et al 2004;Cheng 2013). All of these genes were identified in diploid rice, and PAIR1, PAIR2,PAIR3,OsDMC1,OsREC8,OsCOM1,OsRAD51 and MEICA 1 were especially carefully probed (Nonomura et al 2004;Tian et al 2010;Cheng 2013;Hu et al 2017). Polyploidy is an important manifestation of evolution in Yuguo Xiong and Lu Gan have contributed equally to this work.…”

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confidence: 99%

OsMND1 regulates early meiosis and improves the seed set rate in polyploid rice

Xiong

Gan

et al. 2019

Plant Growth Regul

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The meiotic processes of most polyploid rice (Oryza sativa) are genetically abnormal, leading to low pollen fertility, which results in low seed set rates. Some polyploid meiosis stability (PMeS) lines with high seed set rates have been bred but their meiotic mechanisms remain unknown. In this study, we investigated the function of OsMND1 regulated polyploid rice meiosis. OsMND1 localized in the nucleus, and its expression level in panicles of PMeS line HN2026-4x was higher than in HN2026-2x and the other lines without the PMeS background. OsMND1's overexpression improved pollen fertility and viability, early normal embryo development and the seed set rate in Balilla-4x. However, OsMND1 RNAi in PMeS line HN2026-4x impeded pollen and embryo development significantly. The results of chromosome behavior analyses indicated that OsMND1 participates in stabilizing meiosis by maintaining the balance of pairing, synapsis and recombination during early meiosis. Many univalent, trivalent, and even multivalent systems appeared in the OsMND1 RNAi line, resulting in the presence of many lagging chromosomes. The outcome indicated that OsMND1 plays a critical role in stabilizing meiosis, improving pollen fertility and reducing early embryo abortions, ultimately increasing the seed set rate. Additionally, OsMND1 affected some key meiosis-related gene expression levels. These results raise interesting issues in polyploid breeding theory and application, which require integrated solutions in the future.

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Comparison of fertile and sterile male gametogenesis in Cryptomeria japonica D. Don

Futamura

Igasaki

Saito

et al. 2019

Tree Genetics & Genomes

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The molecular mechanisms of male reproductive organogenesis in rice (Oryza sativa L.)

Cited by 4 publications

References 72 publications

COLLAPSED ABNORMAL POLLEN1Gene Encoding the Arabinokinase-Like Protein Is Involved in Pollen Development in Rice

COLLAPSED ABNORMAL POLLEN1Gene Encoding the Arabinokinase-Like Protein Is Involved in Pollen Development in Rice

OsMND1 regulates early meiosis and improves the seed set rate in polyploid rice

Comparison of fertile and sterile male gametogenesis in Cryptomeria japonica D. Don

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