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Empty pericarp7 encodes a mitochondrial E–subgroup pentatricopeptide repeat protein that is required for ccmFN editing,mitochondrial function and seed development in maize
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Feng Sun Xiaomin Wang Géraldine Bonnard Yun Shen Zhihui Xiu Xiaojie Li Dahai Gao Zhonghang Zhang Bao‐Cai Tan 《The Plant journal : for cell and molecular biology》2015,84(2):283-295
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The pentatricopeptide repeat protein EMPTY PERICARP8 is required for the splicing of three mitochondrial introns and seed development in maize
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Feng Sun Xiaoyan Zhang Yun Shen Hongchun Wang Rui Liu Xiaomin Wang Dahai Gao Yan‐Zhuo Yang Yiwei Liu Bao‐Cai Tan 《The Plant journal : for cell and molecular biology》2018,95(5):919-932
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Emp10 encodes a mitochondrial PPR protein that affects the cis‐splicing of nad2 intron 1 and seed development in maize
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Manjun Cai Shuzhen Li Feng Sun Qin Sun Hailiang Zhao Xuemei Ren Yanxin Zhao Bao‐Cai Tan Zuxin Zhang Fazhan Qiu 《The Plant journal : for cell and molecular biology》2017,91(1):132-144
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The E domains of pentatricopeptide repeat proteins from different organelles are not functionally equivalent for RNA editing 总被引:1,自引:0,他引:1
Anne‐Laure Chateigner‐Boutin Catherine Colas des Francs‐Small Sota Fujii Kenji Okuda Sandra K. Tanz Ian Small 《The Plant journal : for cell and molecular biology》2013,74(6):935-945
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AEF1/MPR25 is implicated in RNA editing of plastid atpF and mitochondrial nad5, and also promotes atpF splicing in Arabidopsis and rice
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Aaron Yap Peter Kindgren Catherine Colas des Francs‐Small Tomohiko Kazama Sandra K. Tanz Kinya Toriyama Ian Small 《The Plant journal : for cell and molecular biology》2015,81(5):661-669
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GIANT EMBRYO encodes CYP78A13, required for proper size balance between embryo and endosperm in rice
Nobuhiro Nagasawa Ken‐Ichiro Hibara Elmer P. Heppard Kent A. Vander Velden Stanley Luck Mary Beatty Yasuo Nagato Hajime Sakai 《The Plant journal : for cell and molecular biology》2013,75(4):592-605
Among angiosperms there is a high degree of variation in embryo/endosperm size in mature seeds. However, little is known about the molecular mechanism underlying size control between these neighboring tissues. Here we report the rice GIANT EMBRYO (GE) gene that is essential for controlling the size balance. The function of GE in each tissue is distinct, controlling cell size in the embryo and cell death in the endosperm. GE, which encodes CYP78A13, is predominantly expressed in the interfacing tissues of the both embryo and endosperm. GE expression is under negative feedback regulation; endogenous GE expression is upregulated in ge mutants. In contrast to the loss‐of‐function mutant with large embryo and small endosperm, GE overexpression causes a small embryo and enlarged endosperm. A complementation analysis coupled with heterofertilization showed that complementation of ge mutation in either embryo or endosperm failed to restore the wild‐type embryo/endosperm ratio. Thus, embryo and endosperm interact in determining embryo/endosperm size balance. Among genes associated with embryo/endosperm size, REDUCED EMBRYO genes, whose loss‐of‐function causes a phenotype opposite to ge, are revealed to regulate endosperm size upstream of GE. To fully understand the embryo–endosperm size control, the genetic network of the related genes should be elucidated. 相似文献
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Rice, a staple food for more than half of the world population, is an important target for iron and zinc biofortification. Current strategies mainly focus on the expression of genes for efficient uptake, long‐distance transport and storage. Targeting intracellular iron mobilization to increase grain iron levels has not been reported. Vacuole is an important cell compartment for iron storage and the NATURAL RESISTANCE ASSOCIATED MACROPHAGE PROTEIN (NRAMP) family of transporters export iron from vacuoles to cytosol when needed. We developed transgenic Nipponbare rice lines expressing AtNRAMP3 under the control of the UBIQUITIN or rice embryo/aleurone‐specific 18‐kDa Oleosin (Ole18) promoter together with NICOTIANAMINE SYNTHASE (AtNAS1) and FERRITIN (PvFER), or expressing only AtNRAMP3 and PvFER together. Iron and zinc were increased close to recommended levels in polished grains of the transformed lines, with maximum levels when AtNRAMP3, AtNAS1 and PvFER were expressed together (12.67 μg/g DW iron and 45.60 μg/g DW zinc in polished grains of line NFON16). Similar high iron and zinc levels were obtained in transgenic Indica IR64 lines expressing the AtNRAMP3, AtNAS1 and PvFER cassette (13.65 μg/g DW iron and 48.18 μg/g DW zinc in polished grains of line IR64_1), equalling more than 90% of the recommended iron increase in rice endosperm. Our results demonstrate that targeting intracellular iron stores in combination with iron and zinc transport and endosperm storage is an effective strategy for iron biofortification. The increases achieved in polished IR64 grains are of dietary relevance for human health and a valuable nutrition trait for breeding programmes. 相似文献
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Rüdinger M Szövényi P Rensing SA Knoop V 《The Plant journal : for cell and molecular biology》2011,67(2):370-380
The plant‐specific pentatricopeptide repeat (PPR) proteins with variable PPR repeat lengths (PLS‐type) and protein extensions up to the carboxyterminal DYW domain have received attention as specific recognition factors for the C‐to‐U type of RNA editing events in plant organelles. Here, we report a DYW‐protein knockout in the model plant Physcomitrella patens specifically affecting mitochondrial RNA editing positions cox1eU755SL and rps14eU137SL. Assignment of DYW proteins and RNA editing sites might best be corroborated by data from a taxon with a slightly different, yet similarly manageable low number of editing sites and DYW proteins. To this end we investigated the mitochondrial editing status of the related funariid moss Funaria hygrometrica. We find that: (i) Funaria lacks three mitochondrial RNA editing positions present in Physcomitrella, (ii) that F. hygrometrica cDNA sequence data identify nine DYW proteins as clear orthologues of their P. patens counterparts, and (iii) that the ‘missing’ 10th DYW protein in F. hygrometrica is responsible for two mitochondrial editing sites in P. patens lacking in F. hygrometrica (nad3eU230SL, nad4eU272SL). Interestingly, the third site of RNA editing missing in F. hygrometrica (rps14eU137SL) is addressed by the DYW protein characterized here and the presence of its orthologue in F. hygrometrica is explained through its simultaneous action on site cox1eU755SL conserved in both mosses. 相似文献
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Daisuke Ogawa Yasuaki Kagaya Yutaka Sato Hidemi Kitano Yasuo Nagato Ryo Ishikawa Akemi Ono Tetsu Kinoshita Shin Takeda Tsukaho Hattori 《The Plant journal : for cell and molecular biology》2015,81(1):1-12
The endosperm of cereal grains represents the most important source of human nutrition. In addition, the endosperm provides many investigatory opportunities for biologists because of the unique processes that occur during its ontogeny, including syncytial development at early stages. Rice endospermless 1 (enl1) develops seeds lacking an endosperm but carrying a functional embryo. The enl1 endosperm produces strikingly enlarged amoeboid nuclei. These abnormal nuclei result from a malfunction in mitotic chromosomal segregation during syncytial endosperm development. The molecular identification of the causal gene revealed that ENL1 encodes an SNF2 helicase family protein that is orthologous to human Plk1‐Interacting Checkpoint Helicase (PICH), which has been implicated in the resolution of persistent DNA catenation during anaphase. ENL1‐Venus (enhanced yellow fluorescent protein (YFP)) localizes to the cytoplasm during interphase but moves to the chromosome arms during mitosis. ENL1‐Venus is also detected on a thread‐like structure that connects separating sister chromosomes. These observations indicate the functional conservation between PICH and ENL1 and confirm the proposed role of PICH. Although ENL1 dysfunction also affects karyokinesis in the root meristem, enl1 plants can grow in a field and set seeds, indicating that its indispensability is tissue‐dependent. Notably, despite the wide conservation of ENL1/PICH among eukaryotes, the loss of function of the ENL1 ortholog in Arabidopsis (CHR24) has only marginal effects on endosperm nuclei and results in normal plant development. Our results suggest that ENL1 is endowed with an indispensable role to secure the extremely rapid nuclear cycle during syncytial endosperm development in rice. 相似文献