芸薹属根肿菌(Plasmodiophora brassica)侵染引起的根肿病蔓延会严重影响芥菜[Brassica juncea(L.)Czern.]的产量和品质。丝裂原活化蛋白激酶(mitogen-activated protein kinases,MAPK)级联作为一种高度保守的信号通路,在植物的生物和...芸薹属根肿菌(Plasmodiophora brassica)侵染引起的根肿病蔓延会严重影响芥菜[Brassica juncea(L.)Czern.]的产量和品质。丝裂原活化蛋白激酶(mitogen-activated protein kinases,MAPK)级联作为一种高度保守的信号通路,在植物的生物和非生物胁迫中发挥重要作用。为了挖掘芥菜抗根肿病相关的MAPK基因,本研究对芥菜进行全基因组鉴定,并对芥菜MAPK基因家族的系统进化以及基因结构等进行生物信息学分析。筛选鉴定的66个BjuMAPK基因不均匀分布在17条染色体上。在基因组尺度上,发现基因的串联重复导致了芥菜MAPK基因数目增多。同一亚族成员之间具有相似的基因结构,不同亚族间差异较大。预测的顺式作用元件与植物激素、抗逆性以及植物的生长发育相关,表达分析显示BjuMAPK02、BjuMAPK15、BjuMAPK17和BjuMAPK19等基因在根肿菌侵染芥菜后具有不同的响应模式。以上结果为进一步研究BjuMAPK基因在芥菜应对根肿病生物胁迫中的功能奠定了理论基础。展开更多
Chinese cabbage(Brassica rapa subsp.pekinensis)is a widely cultivated vegetable crop in Asia with significant economic importance(Li et al.,2024;Yu et al.,2024).As a potyvirus with the broad host range,turnip mosaic v...Chinese cabbage(Brassica rapa subsp.pekinensis)is a widely cultivated vegetable crop in Asia with significant economic importance(Li et al.,2024;Yu et al.,2024).As a potyvirus with the broad host range,turnip mosaic virus(TuMV)is a major pathogen affecting Chinese cabbages,leading to severe yield losses(Li et al.,2019).Traditional control measures have shown limited efficacy,and the long-term use of chemical pesticides has led to significant issues such as environmental pollution and pathogen resistance(Samara et al.,2021;Lu et al.,2022).Biologicallyderived pesticides have garnered considerable attention owing to their eco-friendly attributes(Ayilara et al.,2023).γ-Aminobutyric acid(GABA),initially discovered in potato tubers,has been proven to regulate immune responses and enhance resistance to fungal and bacterial pathogens by modulating reactive oxygen species and stress-related hormone signals(Tarkowski et al.,2020;Wang et al.,2025).But biologically-derived agents typically face challenges such as large particle size and instability,which limit their practical application and bioavailability(Daraban et al.,2023).展开更多
Black spot,a fungal disease caused by Alternaria brassicae infection,inflicts severe damage on Chinese cabbage.Through comparative transcriptomic analysis,this study investigated the molecular mechanisms underlying Ch...Black spot,a fungal disease caused by Alternaria brassicae infection,inflicts severe damage on Chinese cabbage.Through comparative transcriptomic analysis,this study investigated the molecular mechanisms underlying Chinese cabbage’s defense responses to A.brassicae infection.Notably,we found that the expression of BrERF109 was induced by A.brassicae infection.Silencing of BrERF109 by an optimized virus-induced gene silencing(VIGS)assay in Chinese cabbage diminished disease resistance,while BrERF109-overexpression in Arabidopsis enhanced it.Additionally,BrERF109 silencing in Chinese cabbage suppressed indolic glucosinolates gene expression,substantially reducing indolic glucosinolates levels,whereas BrERF109-overexpression in Arabidopsis promoted their accumulation.BrERF109 directly interacts with the BrIGMT4 promoter,thereby facilitating indolic glucosinolates accumulation and enhancing defense against A.brassicae.This study elucidates the BrERF109-BrIGMT4 regulatory module in Chinese cabbage’s defense against A.brassicae infection,while providing valuable data for further investigation of plant-A.brassicae interactions.展开更多
文摘芸薹属根肿菌(Plasmodiophora brassica)侵染引起的根肿病蔓延会严重影响芥菜[Brassica juncea(L.)Czern.]的产量和品质。丝裂原活化蛋白激酶(mitogen-activated protein kinases,MAPK)级联作为一种高度保守的信号通路,在植物的生物和非生物胁迫中发挥重要作用。为了挖掘芥菜抗根肿病相关的MAPK基因,本研究对芥菜进行全基因组鉴定,并对芥菜MAPK基因家族的系统进化以及基因结构等进行生物信息学分析。筛选鉴定的66个BjuMAPK基因不均匀分布在17条染色体上。在基因组尺度上,发现基因的串联重复导致了芥菜MAPK基因数目增多。同一亚族成员之间具有相似的基因结构,不同亚族间差异较大。预测的顺式作用元件与植物激素、抗逆性以及植物的生长发育相关,表达分析显示BjuMAPK02、BjuMAPK15、BjuMAPK17和BjuMAPK19等基因在根肿菌侵染芥菜后具有不同的响应模式。以上结果为进一步研究BjuMAPK基因在芥菜应对根肿病生物胁迫中的功能奠定了理论基础。
基金supported by the National Natural Science Foundation of China(Grant Nos.32402564,32330096,32372631)Hebei Natural Science Foundation(Grant No.C2024204246)+1 种基金the Pinduoduo-China Agricultural University Research Fund(Grant No.PC2023B02018)the 2115 Talent Development Program of China Agricultural University.
文摘Chinese cabbage(Brassica rapa subsp.pekinensis)is a widely cultivated vegetable crop in Asia with significant economic importance(Li et al.,2024;Yu et al.,2024).As a potyvirus with the broad host range,turnip mosaic virus(TuMV)is a major pathogen affecting Chinese cabbages,leading to severe yield losses(Li et al.,2019).Traditional control measures have shown limited efficacy,and the long-term use of chemical pesticides has led to significant issues such as environmental pollution and pathogen resistance(Samara et al.,2021;Lu et al.,2022).Biologicallyderived pesticides have garnered considerable attention owing to their eco-friendly attributes(Ayilara et al.,2023).γ-Aminobutyric acid(GABA),initially discovered in potato tubers,has been proven to regulate immune responses and enhance resistance to fungal and bacterial pathogens by modulating reactive oxygen species and stress-related hormone signals(Tarkowski et al.,2020;Wang et al.,2025).But biologically-derived agents typically face challenges such as large particle size and instability,which limit their practical application and bioavailability(Daraban et al.,2023).
基金supported by the National Key Research and Development Program of China(2022YFF1003003)the National Natural Science Foundation of China(32070333)the Key Research and Development Program of Yangling Seed Innovative Center(Ylzy-sc-04).
文摘Black spot,a fungal disease caused by Alternaria brassicae infection,inflicts severe damage on Chinese cabbage.Through comparative transcriptomic analysis,this study investigated the molecular mechanisms underlying Chinese cabbage’s defense responses to A.brassicae infection.Notably,we found that the expression of BrERF109 was induced by A.brassicae infection.Silencing of BrERF109 by an optimized virus-induced gene silencing(VIGS)assay in Chinese cabbage diminished disease resistance,while BrERF109-overexpression in Arabidopsis enhanced it.Additionally,BrERF109 silencing in Chinese cabbage suppressed indolic glucosinolates gene expression,substantially reducing indolic glucosinolates levels,whereas BrERF109-overexpression in Arabidopsis promoted their accumulation.BrERF109 directly interacts with the BrIGMT4 promoter,thereby facilitating indolic glucosinolates accumulation and enhancing defense against A.brassicae.This study elucidates the BrERF109-BrIGMT4 regulatory module in Chinese cabbage’s defense against A.brassicae infection,while providing valuable data for further investigation of plant-A.brassicae interactions.
