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A novel strigolactone receptor antagonist provides insights into the structural inhibition, conditioning, and germination of the crop parasite Striga.
J Biol Chem
April 2022
Department of Cell and Systems Biology, University of Toronto, Toronto, Canada. Electronic address:
Crop parasites of the Striga genera are a major biological deterrent to food security in Africa and are one of the largest obstacles to poverty alleviation on the continent. Striga seeds germinate by sensing small-molecule hormones, strigolactones (SLs), that emanate from host roots. Although SL receptors (Striga hermonthica HYPOSENSITIVE TO LIGHT [ShHTL]) have been identified, discerning their function has been difficult because these parasites cannot be easily grown under laboratory conditions.
View Article and Find Full Text PDFEmb15 encodes a plastid ribosomal assembly factor essential for embryogenesis in maize.
Plant J
April 2021
Key Laboratory of Plant Development and Environmental Adaptation Biology, Ministry of Education, School of Life Sciences, Shandong University, Qingdao Campus, Qingdao, 266237, China.
Ribosome assembly factors guide the complex process by which ribosomal proteins and the ribosomal RNAs form a functional ribosome. However, the assembly of plant plastid ribosomes is poorly understood. In the present study, we discovered a maize (Zea mays) plastid ribosome assembly factor based on our characterization of the embryo defective 15 (emb15) mutant.
View Article and Find Full Text PDFEncodes a Glutaminase in Vitamin B Biosynthesis Essential for Maize Seed Development.
Plant Physiol
June 2017
Key Lab of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Sciences, Shandong University, Jinan 250100, China (Y.-Z.Y., S.D., Y.W., C.-L.L., Y.S., B.-C.T.);
Vitamin B, an essential cofactor for a range of biochemical reactions and a potent antioxidant, plays important roles in plant growth, development, and stress tolerance. Vitamin B deficiency causes embryo lethality in Arabidopsis (), but the specific role of vitamin B biosynthesis in endosperm development has not been fully addressed, especially in monocot crops, where endosperm constitutes the major portion of the grain. Through molecular characterization of a () mutant in maize, we reveal that vitamin B has differential effects on embryogenesis and endosperm development in maize.
View Article and Find Full Text PDFEmbryo defective 14 encodes a plastid-targeted cGTPase essential for embryogenesis in maize.
Plant J
November 2015
Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Sciences, Shandong University, Jinan, Shandong, 250100, China.
The embryo defective (emb) mutants in maize genetically define a unique class of loci that is required for embryogenesis but not endosperm development, allowing dissection of two developmental processes of seed formation. Through characterization of the emb14 mutant, we report here that Emb14 gene encodes a circular permuted, YqeH class GTPase protein that likely functions in 30S ribosome formation in plastids. Loss of Emb14 function in the null mutant arrests embryogenesis at the early transition stage.
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