The mechanism of starch content increase in grain of autotetraploid rice (Oryza sativa L.)

Yang, Pengming; XueBiao, Zhou; Huang, Qiliang

doi:10.32615/ps.2019.044

Cited by 6 publications

(4 citation statements)

References 54 publications

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“…Polyploids often show larger stomatal guard cells, larger stomatal openings, a lower stomatal density, and wider xylem conduits. This in turn affects water transport but can do so in opposite directions, providing a positive (Vyas et al 2007, Ntuli and Zobolo 2008, Zhou et al 2015, Dudits et al 2016, Wang et al 2019, Yang et al 2019, Zhang et al 2020), negative (Niu et al 2016), or neutral (Solhaug et al 2016) effect on photosynthetic rates and usually increasing drought resistance (Ntuli and Zobolo 2008, Li et al 2009, van Laere et al 2011, Deng et al 2012, Del Pozo and Ramirez‐Parra 2014, Zhang et al 2015, Rao et al 2020, Jiang et al 2022). Moreover, the increased surface area to volume ratio of larger cells slows down the cell cycle (Cavalier‐Smith 1978, Comai 2005).…”

Section: Immediate Fitness Effects Of Polyploidization: Novel Phenotypementioning

confidence: 99%

Understanding polyploid establishment: temporary persistence or stable coexistence?

Mortier,

Bafort,

Milosavljevic

et al. 2024

Oikos

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Polyploidy, resulting from whole‐genome duplication (WGD), is ubiquitous in nature and reportedly associated with extreme environments and biological invasions. However, WGD usually comes with great costs, raising questions about the establishment chance of newly formed polyploids. The surprisingly high number of polyploid and mixed‐ploidy species observed in nature may be a consequence of their continuous emergence or may reflect stable polyploid persistence and even coexistence with the ancestral ploidy under certain circumstances. However, empirical studies on contemporary polyploid establishment often neglect the cost–benefit balances of polyploid characteristics, tradeoffs between phenotypic characteristics, intercytotype interactions, recurrent polyploid formation, and stochastic processes. Here, we advocate for considering population‐level success, combining the aforementioned factors that affect polyploid establishment and long‐term coexistence with their ancestors. We approach the paradox of polyploid establishment despite high costs from a modern coexistence theory perspective and give an overview of the diversity of mechanisms and their timing that may potentially enable stable rather than transient persistence.

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Section: Immediate Fitness Effects Of Polyploidization: Novel Phenotypementioning

confidence: 99%

Understanding polyploid establishment: temporary persistence or stable coexistence?

Mortier,

Bafort,

Milosavljevic

et al. 2024

Oikos

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“…The change of ploidy has an obvious effect on photosynthetic characteristics. Yang et al also found that autotetraploid rice lines had a high photosynthetic capacity and high light-utilization efficiency [91]. In fact, the relationship between ploidy and photosynthetic parameters is very complex.…”

Section: Autotetraploid Ricementioning

confidence: 99%

“…There are four alleles at Wx locus in autotetraploid glutinous rice, so the range of genotypes and phenotypes of hybrids between autotetraploid glutinous rice and non-glutinous rice is much more complex than that of diploid rice. Yang et al researched the mechanism of starch content increase in grain of autotetraploid rice [91]. They found that the activities of ADP-glucose pyrophosphorylase, soluble starch synthase, and starch-branching enzyme in grains of autotetraploid rice lines were higher than those in grains of corresponding diploid rice lines during the grain-filling stage.…”

Section: Autotetraploid Ricementioning

confidence: 99%

A New Way of Rice Breeding: Polyploid Rice Breeding

Chen

Feng

Zhang

et al. 2021

Plants

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Polyploid rice, first discovered by Japanese scientist Eiiti Nakamori in 1933, has a history of nearly 90 years. In the following years, polyploid rice studies have mainly focused on innovations in breeding theory, induction technology and the creation of new germplasm, the analysis of agronomic traits and nutritional components, the study of gametophyte development and reproduction characteristics, DNA methylation modification and gene expression regulation, distant hybridization and utilization among subspecies, species and genomes. In recent years, PMeS lines and neo-tetraploid rice lines with stable high seed setting rate characteristics have been successively selected, breaking through the bottleneck of low seed setting rate of polyploid rice. Following, a series of theoretical and applied studies on high seed setting rate tetraploid rice were carried out. This has pushed research on polyploid rice to a new stage, opening new prospects for polyploid rice breeding.

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“…Indica and japonica autotetraploid hybrid plants produced by colchicine-induced doubling are large, which provides support for increased yields 16 . Compared with diploid rice, Aautotetraploid rice has a higher photosynthetic capacity and light energy use efficiency and more effectively converts photosynthetic products into starch 17 . Chromosome doubling of rice can increase tolerance to drought stress 18 , and chromosome polyploidization induces the expression of genes related to pollen ontogeny, cell metabolism, cell physiology and so forth 19 .…”

Section: Introductionmentioning

confidence: 99%

Physiologic and molecular responses of indica–japonica subspecies tetraploid rice seed germination to ion beams

Huang

2022

Sci Rep

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Ionizing radiation can not only reduce the yield of rice but also cause rice toxicity, and consumption of this kind of rice threatens human health. Moreover, the production and application of freon has further caused a hole in the earth’s ozone layer, increasing the amount of ionizing radiation from the sun affecting rice. To select and breed new radiation-resistant rice varieties, dry seeds of the indica–japonica subspecies of tetraploid rice subjected to different doses of ionizing radiation were investigated for their responses during germination. The results showed that the relative water absorption, seed vigour and GA3 content sharply decreased in response to three different doses of ionizing radiation, and the regulation of the expression of genes related to α-amylase synthesis and gibberellin metabolism was disrupted. Moreover, the degree of inhibition increased with increasing dose. Notably, under 3.0 × 1017 ions/cm2 radiation, an upregulation of OsGA3ox2 expression resulted in a sharp increase in GA3 content in the indica–japonica tetraploid rice, and upregulated expression of OsAmy3A and OsAmy3D resulted in sharp increase in α-amylase activity, water absorption, and sucrose and fructose contents, which resulted in the seed vigour being greater than that of its parents. The results indicate that additional research on the physiological and molecular features of indica–japonica tetraploid rice seed germination in response to ionizing radiation is needed.

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The mechanism of starch content increase in grain of autotetraploid rice (Oryza sativa L.)

Cited by 6 publications

References 54 publications

Understanding polyploid establishment: temporary persistence or stable coexistence?

Understanding polyploid establishment: temporary persistence or stable coexistence?

A New Way of Rice Breeding: Polyploid Rice Breeding

Physiologic and molecular responses of indica–japonica subspecies tetraploid rice seed germination to ion beams

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