Bifunctional regulators of photoperiodic flowering in short day plant rice

Sun, Changhui; He, Changcai; Zhong, Chao; Liu, Shihang; Liu, Hongying; Luo, Xu; Li, Jun; Zhang, Yuxiu; Guo, Yuting; Yang, Bin; Wang, Pingrong; Deng, Xiping

doi:10.3389/fpls.2022.1044790

Cited by 5 publications

(5 citation statements)

References 102 publications

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“…2011 )⁠. The flowering time regulation pathway is well documented in Asian rice O. sativa, and numerous additional key genes, including OsGI and Ghd7 , were identified to be involved in photoperiodic flowering pathway controlling the two florigen genes Hd3a and RICE FLOWERING LOCUS T 1 (RFT1) through the Hd1 flowering gene ( Sun et al . 2022 ; Osnato 2023 )⁠.…”

Section: Discussionmentioning

confidence: 99%

Genome-wide association analysis identifies natural allelic variants associated with panicle architecture variation in African rice, Oryza glaberrima Steud

Ntakirutimana

Tranchant‐Dubreuil

Cubry

et al. 2023

G3: Genes, Genomes, Genetics

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African rice (Oryza glaberrima Steud.), a short-day cereal crop closely related to Asian rice (Oryza sativa L.), has been cultivated in Sub-Saharan Africa for ∼ 3000 years. Although less cultivated globally, it is a valuable genetic resource in creating high-yielding cultivars that are better adapted to diverse biotic and abiotic stresses. While inflorescence architecture, a key trait for rice grain yield improvement, has been extensively studied in Asian rice, the morphological and genetic determinants of this complex trait are less understood in African rice. In this study, using a previously developed association panel of 162 O. glaberrima accessions and new SNP variants characterized through mapping to a new version of the O. glaberrima reference genome, we conducted a genome-wide association study of four major morphological panicle traits. We have found a total of 41 stable genomic regions that are significantly associated with these traits, of which 13 co-localized with previously identified QTLs in O. sativa populations and 28 were unique for this association panel. Additionally, we found a genomic region of interest on chromosome 3 that was associated with the number of spikelets and primary and secondary branches. Within this region was localized the O. sativa ortholog of the PHYTOCHROME B gene (Oglab_006903/OgPHYB). Haplotype analysis revealed the occurrence of natural sequence variants at the OgPHYB locus associated with panicle architecture variation through modulation of the flowering time phenotype, whereas no equivalent alleles were found in O. sativa. The identification in this study of genomic regions specific to O. glaberrima indicates panicle-related intra-specific genetic variation in this species, increasing our understanding of the underlying molecular processes governing panicle architecture. Identified candidate genes and major haplotypes may facilitate the breeding of new African rice cultivars with preferred panicle traits.

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Section: Discussionmentioning

confidence: 99%

Genome-wide association analysis identifies natural allelic variants associated with panicle architecture variation in African rice, Oryza glaberrima Steud

Ntakirutimana

Tranchant‐Dubreuil

Cubry

et al. 2023

G3: Genes, Genomes, Genetics

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“…As such, it shares more similarity with rice in terms of the mechanisms of its photoperiodic-flowering induction pathway. Like arabidopsis, rice possesses a CONSTANS-like gene, but this gene is known as Hd1 or Heading date 1 7,8 . Unlike in Arabidopsis, Hd1 in rice is not a central hub for signal integration, but rather a bifunctional regulator which performs different functions based on the presence of different enhancer proteins 8 .…”

Section: Introductionmentioning

confidence: 99%

“…or Heading date 1 7,8 . Unlike in Arabidopsis, Hd1 in rice is not a central hub for signal integration, but rather a bifunctional regulator which performs different functions based on the presence of different enhancer proteins 8 .…”

Section: Introductionmentioning

confidence: 99%

“…This is because phytochrome is a signaling molecule which, when exposed to red or far-red light, undergoes a conformational change due to the excitation of the chromophore 18 . When it is irradiated by red light, which is present in high concentrations in full sunlight, it translocates to the nucleus and controls gene expression, which helps to entrain the circadian clock, informing the plant on a cellular level that it is daytime 1,7,18,19 . Shady light or dusk is rich in FR light, and so is moonlight.…”

Section: Introductionmentioning

confidence: 99%

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Characterizing the expression patterns of short-day flowering genes, the manipulation of their expression using red-far red wavelengths, and the resulting phenotype/ chemotype inCannabis sativa

Haiden

2024

Preprint

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Cannabis is a short day (SD) plant whose inflorescences produce valuable medicines. By studying the mechanisms of photoperiodic flowering initiation in cannabis, we may develop new methods of improving cultivation. In SD plants, CONSTANS, which is enhanced by CDL gated proteins that are expressed during short days, acts as a bifunctional regulator of flower inhibition or genesis via FT (florigen). These genes are downstream of phytochrome, which may be activated by horticultural lighting conditions like red (R, 660nm) to far red (FR, 700+nm) wavelength ratios. This study demonstrates that gene expression can be manipulated using high and low R:FR ratios, and characterizes the expression levels of CONSTANS, FT, PRR37, and SOC1 in cannabis over the first 14 short days. It also demonstrates the resulting effect on cannabinoid production and biomass yields.

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“…Flowering time is determined by a combination of endogenous genetic components and external environmental factors, such as photoperiod (daylength) and temperature [ 2 ]. Photoperiod induces flowering through three steps: the perception of the light signal, the regulation of the circadian clock, and flowering initiation [ 1 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

Photoperiod Genes Contribute to Daylength-Sensing and Breeding in Rice

Qiu

Zhou

Wang

et al. 2023

Plants

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Rice (Oryza sativa L.), one of the most important food crops worldwide, is a facultative short-day (SD) plant in which flowering is modulated by seasonal and temperature cues. The photoperiodic molecular network is the core network for regulating flowering in rice, and is composed of photoreceptors, a circadian clock, a photoperiodic flowering core module, and florigen genes. The Hd1-DTH8-Ghd7-PRR37 module, a photoperiodic flowering core module, improves the latitude adaptation through mediating the multiple daylength-sensing processes in rice. However, how the other photoperiod-related genes regulate daylength-sensing and latitude adaptation remains largely unknown. Here, we determined that mutations in the photoreceptor and circadian clock genes can generate different daylength-sensing processes. Furthermore, we measured the yield-related traits in various mutants, including the main panicle length, grains per panicle, seed-setting rate, hundred-grain weight, and yield per panicle. Our results showed that the prr37, elf3-1 and ehd1 mutants can change the daylength-sensing processes and exhibit longer main panicle lengths and more grains per panicle. Hence, the PRR37, ELF3-1 and Ehd1 locus has excellent potential for latitude adaptation and production improvement in rice breeding. In summary, this study systematically explored how vital elements of the photoperiod network regulate daylength sensing and yield traits, providing critical information for their breeding applications.

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Bifunctional regulators of photoperiodic flowering in short day plant rice

Cited by 5 publications

References 102 publications

Genome-wide association analysis identifies natural allelic variants associated with panicle architecture variation in African rice, Oryza glaberrima Steud

Genome-wide association analysis identifies natural allelic variants associated with panicle architecture variation in African rice, Oryza glaberrima Steud

Characterizing the expression patterns of short-day flowering genes, the manipulation of their expression using red-far red wavelengths, and the resulting phenotype/ chemotype inCannabis sativa

Photoperiod Genes Contribute to Daylength-Sensing and Breeding in Rice

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