行业资讯

25th PGC学术预告 | 学生报告

时间：2026-08-07 21:30 所属分类：行业资讯 点击次数：

报告人 · 陈树栋中国科学院遗传与发育生物学研究所报告时间：8.20 16:00 - 16:15报告题目：Cold-induced peptide signal

报告人 · 陈树栋
中国科学院遗传与发育生物学研究所

报告时间：8.20 16:00 - 16:15
报告题目：Cold-induced peptide signalling secures pollen resilience and crop yield
摘要：Climate change exacerbates the unpredictability and frequency of such weather events, highlighting the need for cold-resilient crops. Cold-induced pollen abortion and reproductive failure during flowering are major causes of yield losses, yet the molecular mechanisms and signalling pathways that underlie cold resilience in pollen development remain unknown. Here we identify a subset of cold-responsive small signalling peptides in the RGF–GLV–CLEL family, SlRGF9 and SlRGF10, that control cold resilience in tomato pollen. The leucine-rich repeat receptor-like kinases, SlRGFR6 and SlSERK proteins, form cell-surface receptor complexes that bind to these cold-induced SlRGFs. Furthermore, SlRGF–SlRGFR6 signalling activates calcium influx through cyclic-nucleotide-gated channels, counteracting cold-delayed programmed cell death and ensuring tapetum degradation to support microspore development. Upregulating SlRGF9 and SlRGF10 in tomato plants prevents cold-induced yield losses by up to 52%. This cold-responsive peptide signalling pathway is conserved across dicots and monocots. Upregulation of RGF homologues in rice (Oryza sativa) boosts cold resilience in pollen and recovers 18.3% of grain yield loss. Our findings uncover a core peptide signalling axis that governs cold resilience in pollen and has broad potential for safeguarding crop productivity against cold stress.

报告人 · 胡昊
北京大学

报告时间：8.21 15:50 - 16:05
报告题目：Quantification and transcriptome profiling reveal abundant, dynamic, and translatable dephospho-CoA-capped RNAs in Arabidopsis
摘要：Cellular metabolites have emerged as non-canonical RNA caps. Despite its early discovery as an RNA cap, the dephospho-CoA (dpCoA) cap remains largely uncharacterized due to a lack of detection technologies. Here, we use biochemical and structural analysis to identify Arabidopsis NUDT11 as a specific decapping enzyme towards dpCoA-RNA. Leveraging this specificity, we develop biochemical and transcriptomic methods to quantify and profile dpCoA-RNA genome-wide, revealing that dpCoA-RNAs exist across species and exhibit tissue- and/or condition-specific variations. In Arabidopsis, dpCoA-RNAs possess distinct transcription start sites and respond more rapidly to high light intensity as compared to 7-methylguanosine (m7G)-capped RNAs. Moreover, Arabidopsis dpCoA-RNAs can reach up to 15% of m7G-capped RNAs in abundance and are associated with translating ribosomes. We further demonstrate that an in vitro transcribed dpCoA-RNA is translated in human cells. This study uncovers a dynamic dpCoA cap that may potentially influence gene expression and establishes a toolkit for future investigations.

报告人 · 何明亮
北京大学

报告时间：8.20 17:50 - 18:05
报告题目：Boron-bridged GIPCs stabilize cell wall anchoring and PIN polar domains
摘要：Boron (B) is an essential plant micronutrient whose deficiency impairs global crop yields. Glycosylinositol phosphorylceramides (GIPCs) are major lipids in the plasma membrane (PM), and PIN-FORMED (PIN) proteins mediate polar auxin transport (PAT) via asymmetric PM localization. This study demonstrates that these components are functionally linked: B cross-links nearly all GIPC series, forming physical PM-cell wall attachments visualized as Hechtian strands. B-mediated cross-linking also restricts PIN2 lateral diffusion and endocytosis, stabilizing its polar domain formation via direct GIPC-PIN2 interaction. Phenotypic evidence supports this mechanism, as both B deficiency and impaired GIPC biosynthesis phenocopy high-order pin mutants, showing defective PIN localization and diminished auxin maxima. Thus, the B-dependent, GIPC-mediated PM-cell wall continuum immobilizes PIN polar domains, enabling PAT and ensuring proper plant development and environmental adaptation.

报告人 · 孟曦
南京农业大学

报告时间：8.21 11:55 - 12:10
报告题目：Surface immune signalling unlocks NLR activation through mRNA alternative splicing
摘要：Plants deploy two layered immune systems—pattern-triggered immunity (PTI) and effector-triggered immunity (ETI)—to combat pathogen infection, yet the molecular crosstalk between these layers and how plants balance immune activation with autoimmunity risks remain elusive. Here, we uncover a regulatory mechanism in which surface immune signalling unlocks nucleotide-binding leucine-rich repeat (NLR) immune receptor activation through an mRNA splicing switch. We identify an N-terminal pro-domain in the potato late blight resistance protein Rpi-vnt1.1 that inhibits resistosome formation and potential auto-activation of this NLR, acting as a “safety lock”. Upon pathogen perception, PTI signalling rapidly induces alternative splicing of Rpi-vnt1.1 pre-mRNA, excising the 5’ U12-type intron and removing the inhibitory element.This switches the translational output to a spliced isoform that exposes the MADA motif, priming the NLR for effector recognition. The primed Rpi-vnt1.1 then swiftly assembles resistosomes and triggers immune responses upon detection of the cognate Phytophthora infestans effector AVRvnt1.We further demonstrate that this ‘pre-positioned safety’ regulatory logic is conserved among N-terminally extended coiled-coil NLRs across diverse plant species. Our findings establish a previously uncharacterized splicing-mediated checkpoint that couples cell-surface danger sensing to intracellular immune activation, offering new insights into the rational deployment of resistance genes for crop disease control.

报告人 · 包珠拉太
西北农林科技大学

报告时间：8.22 10:00 - 10:15
报告题目：Roots navigate around decay regions by sensing local pH gradients
摘要：Plant tropisms enable roots to navigate complex soils by responding to directional environmental cues. Biological decay, although central to nutrient cycling, also creates microbially active and potentially hostile niches. In this work, we identified “saprotropism,” a previously unrecognized growth responsethat enables roots to actively bend away from decaying plant-derived matter. Fungal-driven microbial decomposition released organic acids and formed stable pH gradients in surrounding soil, allowing roots to pinpoint decay without direct contact. Root epidermal cells sensed this acidic gradient through the root meristem growth factor peptide-receptor module, converting external pH asymmetry into asymmetric abscisic acid (ABA) distribution. ABA asymmetry drove microtubule reorganization, which was decoded into decayavoidant root bending. Together, these findings establish microbial decay–derived chemical gradients as an instructive signal for root navigation and expand the framework of microbe-soil-plant communication.

第二十五届全国植物基因组学大会将于2026年8月19日–22日在内蒙古自治区呼和浩特市召开，大会同期将举办Plant Innovation 首届编辑委员会会议及植物遗传与基因组学专业委员会工作会议，诚邀国内同行参加！