The t<scp>RNA</scp> 3′‐<scp>e</scp>nd Processing Enzyme t<scp>RN</scp>ase Z2 Contributes to Chloroplast Biogenesis in Rice

Long, Tuan; Guo, Dong; He, Dong Ming; Shen, Wenjie; Li, Xianghua

doi:10.1111/jipb.12102

Cited by 8 publications

(7 citation statements)

References 55 publications

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“…Chlorophyll content was assayed in most studies [ 55 ]. Other studies have focused on regulatory factors involved in chlorophyll synthesis, such as transcription factors and regulatory proteins [ 56 , 57 ]. Song [ 58 ] used microarray hybridization to identify genes involved in photosynthesis and chlorophyll synthesis in response to heat stress, but no metabolic pathways were mentioned.…”

Section: Discussionmentioning

confidence: 99%

Uniconazole-induced starch accumulation in the bioenergy crop duckweed (Landoltia punctata) I: transcriptome analysis of the effects of uniconazole on chlorophyll and endogenous hormone biosynthesis

Yang

Fang

Huang

et al. 2015

Biotechnol Biofuels

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BackgroundDuckweed is a novel aquatic bioenergy crop that is found ubiquitously throughout the world. Uniconazole plays an important role in improving crop production through the regulation of endogenous hormone levels. We found that a high quantity and quality of duckweed growth can be achieved by uniconazole application, although the mechanisms are unknown.ResultsThe fronds of Landoltia punctata were sprayed evenly with 800 mg/L uniconazole. The dry weight following treatment increased by 10% compared to the controls at 240 h. Endogenous cytokinin (CK) and abscisic acid (ABA) content both increased compared to the control, while the level of gibberellins (GAs) decreased. Additionally, gene expression profiling results showed that the expression of transcripts encoding key enzymes involved in endogenous CK and ABA biosynthesis were up-regulated, while the transcripts of key enzymes for GAs biosynthesis were down-regulated. On the other hand, chlorophyll a and chlorophyll b contents were both increased compared with the control. Moreover, the net photosynthetic rate was elevated to 25.6 μmol CO2/m2/s compared with the control value of 22.05 μmol CO2/m2/s. Importantly, the expression of some chlorophyll biosynthesis-related transcripts was up-regulated.ConclusionUniconazole treatment altered endogenous hormone levels and enhanced chlorophyll content and net photosynthetic rate in duckweed by regulating key enzymes involved in endogenous hormone and chlorophyll biosynthesis. The alterations of endogenous hormones and the increase of chlorophyll and photosynthetic rate data support the increase of biomass and starch accumulation.Electronic supplementary materialThe online version of this article (doi:10.1186/s13068-015-0246-7) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Uniconazole-induced starch accumulation in the bioenergy crop duckweed (Landoltia punctata) I: transcriptome analysis of the effects of uniconazole on chlorophyll and endogenous hormone biosynthesis

Yang

Fang

Huang

et al. 2015

Biotechnol Biofuels

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“…7). RNase Z S2 localizes in the chloroplast and is essential to chloroplast development 31 . In humans, ELAC2 (RNase Z L ) localizes in the nucleus and mitochondria 32,33 .…”

Section: Discussionmentioning

confidence: 99%

RNase ZS1 processes UbL40 mRNAs and controls thermosensitive genic male sterility in rice

et al. 2014

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Thermosensitive genic male-sterile (TGMS) lines, which are male-sterile at restrictive (high) temperatures but male-fertile at permissive (low) temperatures, have been widely used in breeding two-line hybrid rice (Oryza sativa L.). Here we find that mutation of thermosensitive genic male sterile 5 (tms5) in rice causes the TGMS trait through a loss of RNase Z S1 function. We show that RNase Z S1 processes the mRNAs of three ubiquitin fusion ribosomal protein L40 (Ub L40 ) genes into multiple fragments in vitro and in vivo. In tms5 mutants, high temperature results in increased levels of Ub L40 mRNAs. Overaccumulation of Ub L40 mRNAs causes defective pollen production and male sterility. Our results uncover a novel mechanism of RNase Z S1 -mediated Ub L40 mRNA regulation and shows that loss of this regulation produces TGMS in rice, a finding with potential applications in hybrid crop breeding.

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“…Two differentially expressed transcripts, one of them containing the ribosomal protein gene rpl5 , were identified by examining the transcripts of the whole mitochondrial genomes of a WA-CMS line, Zhenshan 97A and of its maintainer, Zhenshan 97B (Liu et al [ 2007 ]). The same group recently used rpl5 to probe the rearranged region in the mitochondrial genome and identified the WA-CMS gene, named WA352 ( Wild Abortive 352 ), which is comprised of three rice mitochondrial genomic segments ( orf284 , orf224 , and orf288 ) and one segment of unknown origin (Figure 1 ), and encodes a 352-residue putative protein with three transmembrane segments (Luo et al [ 2013 ]).…”

Section: Genetics Of Cms and Fertility Restorationmentioning

confidence: 99%

Workable male sterility systems for hybrid rice: Genetics, biochemistry, molecular biology, and utilization

Huang

Zhiguo

Zhang

et al. 2014

Rice

103

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The exploitation of male sterility systems has enabled the commercialization of heterosis in rice, with greatly increased yield and total production of this major staple food crop. Hybrid rice, which was adopted in the 1970s, now covers nearly 13.6 million hectares each year in China alone. Various types of cytoplasmic male sterility (CMS) and environment-conditioned genic male sterility (EGMS) systems have been applied in hybrid rice production. In this paper, recent advances in genetics, biochemistry, and molecular biology are reviewed with an emphasis on major male sterility systems in rice: five CMS systems, i.e., BT-, HL-, WA-, LD- and CW- CMS, and two EGMS systems, i.e., photoperiod- and temperature-sensitive genic male sterility (P/TGMS). The interaction of chimeric mitochondrial genes with nuclear genes causes CMS, which may be restored by restorer of fertility (Rf) genes. The PGMS, on the other hand, is conditioned by a non-coding RNA gene. A survey of the various CMS and EGMS lines used in hybrid rice production over the past three decades shows that the two-line system utilizing EGMS lines is playing a steadily larger role and TGMS lines predominate the current two-line system for hybrid rice production. The findings and experience gained during development and application of, and research on male sterility in rice not only advanced our understanding but also shed light on applications to other crops.Electronic supplementary materialThe online version of this article (doi:10.1186/s12284-014-0013-6) contains supplementary material, which is available to authorized users.

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The tRNA 3′‐end Processing Enzyme tRNase Z2 Contributes to Chloroplast Biogenesis in Rice

Cited by 8 publications

References 55 publications

Uniconazole-induced starch accumulation in the bioenergy crop duckweed (Landoltia punctata) I: transcriptome analysis of the effects of uniconazole on chlorophyll and endogenous hormone biosynthesis

Uniconazole-induced starch accumulation in the bioenergy crop duckweed (Landoltia punctata) I: transcriptome analysis of the effects of uniconazole on chlorophyll and endogenous hormone biosynthesis

RNase ZS1 processes UbL40 mRNAs and controls thermosensitive genic male sterility in rice

Workable male sterility systems for hybrid rice: Genetics, biochemistry, molecular biology, and utilization

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