ArticleThe Plant journal : for cell and molecular biology2008
OsTDL1A binds to the LRR domain of rice receptor kinase MSP1, and is required to limit sporocyte numbers.
Article in The Plant journal : for cell and molecular biology, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 69 papers.
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69 citing papers in PubMed, 164 citations in OpenAlex.
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- Unlocking fertility in the female gametophyte: a DEAD-box RNA helicase is essential for embryo sac development and seed setting.Journal of experimental botany · 2024Article
- OsRH52A, a DEAD-box protein, regulates functional megaspore specification and is required for embryo sac development in rice.Journal of experimental botany · 2024Article
- Lectin Receptor-Like Protein Kinase OsNRFG6 is Required for Embryo Sac Development and Fertilization in Neo-Tetraploid Rice.Rice (New York, N.Y.) · 2024Article
- Revisiting the female germline cell development.Frontiers in plant science · 2024Review
- TFIIB-Related Protein BRP5/PTF2 Is Required for Both Male and Female Gametogenesis and for Grain Formation in Rice.International journal of molecular sciences · 2023Article
- BOTRYOID POLLEN 1 regulates ROS-triggered PCD and pollen wall development by controlling UDP-sugar homeostasis in rice.The Plant cell · 2023Article
- Low temperature compensates for defective tapetum initiation to restore the fertility of the novel TGMS line ostms15.Plant biotechnology journal · 2023Article
- Dissection of Developmental Programs and Regulatory Modules Directing Endosperm Transfer Cell and Aleurone Identity in the Syncytial Endosperm of Barley.Plants (Basel, Switzerland) · 2023Article
- 3D cellular morphometrics of ovule primordium development inFrontiers in plant science · 2023Article
- The tapetal tissue is essential for the maintenance of redox homeostasis during microgametogenesis in tomato.The Plant journal : for cell and molecular biology · 2022Article
- Specification of female germline by microRNA orchestrated auxin signaling in Arabidopsis.Nature communications · 2022Article
- Evolution of Transcriptomes in Early-Generation Hybrids of the ApomicticInternational journal of molecular sciences · 2022Article
- Article
9 more citing papers are in PubMed but not listed here.
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9 authors at 3 institutions in 3 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Hybrids lose heterotic yield advantage when multiplied sexually via meiosis. A potential alternative breeding system for hybrids is apospory, where female gametes develop without meiosis. Common among grasses, apospory begins in the nucellus, where aposporous initials (AIs) appear near the sexual megaspore mother cell (MeMC). The cellular origin of AIs is obscure, but one possibility, suggested by the mac1 and msp1 mutants of maize and rice, is that AIs are apomeiotic derivatives of the additional MeMCs that appear when genetic control over sporocyte numbers is relaxed. MULTIPLE SPOROCYTES1 (MSP1) encodes a leucine-rich-repeat receptor kinase, which is orthologous to EXS/EMS1 in Arabidopsis. Like mac1 and msp1, exs/ems1 mutants produce extra sporocytes in the anther instead of a tapetum, causing male sterility. This phenotype is copied in mutants of TAPETUM DETERMINANT1 (TPD1), which encodes a small protein hypothesized to be an extracellular ligand of EXS/EMS1. Here we show that rice contains two TPD1-like genes, OsTDL1A and OsTDL1B. Both are co-expressed with MSP1 in anthers during meiosis, but only OsTDL1A and MSP1 are co-expressed in the ovule. OsTDL1A binds to the leucine-rich-repeat domain of MSP1 in yeast two-hybrid assays and bimolecular fluorescence complementation in onion cells; OsTDL1B lacks this capacity. When driven by the maize Ubiquitin1 promoter, RNA interference against OsTDL1A phenocopies msp1 in the ovule but not in the anther. Thus, RNAi produces multiple MeMCs without causing male sterility. We conclude that OsTDL1A binds MSP1 in order to limit sporocyte numbers. OsTDL1A-RNAi lines may be suitable starting points for achieving synthetic apospory in rice.
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