Contrasting nutrient-disease relationships: Potassium gradients in barley leaves have opposite effects on two fungal pathogens with different sensitivities to jasmonic acid.
Contrasting nutrient-disease relationships: Potassium gradients in barley leaves have opposite effects on two fungal pathogens with different sensitivities to jasmonic acid.
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对比营养疾病的关系：大麦叶中的钾梯度对两种对茉莉酸敏感性不同的真菌病原体的影响相反。
DOI：
10.1111/pce.13350
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发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
Amtmann A
中科院分区：
文献类型：
--
作者：
Davis JL;Armengaud P;Larson TR;Graham IA;White PJ;Newton AC;Amtmann A
了解矿物营养与病害之间的相互作用对作物管理至关重要。我们以前对拟南芥的研究表明，缺钾诱导了茉莉酸的生物合成，提高了植物对植食性昆虫的抗性。在这里，我们解决了组织K如何影响真菌病原体的发展，以及病原体对JA的敏感性是否可以在大麦K-疾病关系中发挥作用的问题。光学）。我们报告说，钾剥夺大麦植物表现出增加叶片浓度的JA和其他氧化脂。此外，钾充足植物叶片内的自然尖端至基部钾浓度梯度定量地反映了JA响应基因的转录水平。当地叶组织钾浓度影响的发展，两个经济上重要的真菌以相反的方式，表现出正相关性与白粉病（Blumeria graminis）和负相关性与叶枯（Rhynchosporium commune）疾病的症状。B. graminis在植物中诱导JA应答并且对甲基JA处理敏感，而普通根瘤菌不引发JA应答并且对JA不敏感。我们的研究挑战的观点，高钾通常改善植物健康，并建议JA病原体的敏感性可能是一个重要因素，在确定确切的K-疾病的关系。茉莉酸（JA）是一种植物激素，在叶片衰老和病原菌防御中起重要作用.我们的发现表明，JA生物合成受到叶片中低浓度钾（K）的上调，这表明JA可能提供了植物K状态和真菌疾病之间的分子联系。这一假设进一步得到以下发现的支持：大麦叶片上的病害症状与JA敏感的白粉病（Blumeria graminis）的叶片K含量呈正相关，但与JA不敏感的叶霉病（Rhynchosporium commune）的叶片K含量呈负相关。
Understanding the interactions between mineral nutrition and disease is essential for crop management. Our previous studies with Arabidopsis thaliana demonstrated that potassium (K) deprivation induced the biosynthesis of jasmonic acid (JA) and increased the plant's resistance to herbivorous insects. Here, we addressed the question of how tissue K affects the development of fungal pathogens and whether sensitivity of the pathogens to JA could play a role for the K–disease relationship in barley (Hordeum vulgare cv. Optic). We report that K‐deprived barley plants showed increased leaf concentrations of JA and other oxylipins. Furthermore, a natural tip‐to‐base K‐concentration gradient within leaves of K‐sufficient plants was quantitatively mirrored by the transcript levels of JA‐responsive genes. The local leaf tissue K concentrations affected the development of two economically important fungi in opposite ways, showing a positive correlation with powdery mildew (Blumeria graminis) and a negative correlation with leaf scald (Rhynchosporium commune) disease symptoms. B. graminis induced a JA response in the plant and was sensitive to methyl‐JA treatment whereas R. commune initiated no JA response and was JA insensitive. Our study challenges the view that high K generally improves plant health and suggests that JA sensitivity of pathogens could be an important factor in determining the exact K–disease relationship. Jasmonic acid (JA) is a plant hormone with important roles in leaf senescence and pathogen defence. Our finding that JA biosynthesis is up‐regulated by low concentrations of potassium (K) in leaves suggests that JA may provide the molecular link between plant K status and fungal disease. This hypothesis was further supported by the finding that disease symptoms on barley leaves were positively correlated with leaf K content for the JA‐sensitive powdery mildew (Blumeria graminis) but negatively correlated with leaf K content for the JA‐insensitive leaf scald (Rhynchosporium commune).
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影响因子：
27.5
作者：
Armengaud P;Breitling R;Amtmann A
通讯作者：
Amtmann A
影响因子：
4.1
作者：
Cowley, T;Walters, D
通讯作者：
Walters, D
影响因子：
7.2
作者：
Beyhl, Diana;Hoertensteiner, Stefan;Hedrich, Rainer
通讯作者：
Hedrich, Rainer
影响因子：
7.2
作者：
Bonaventure, Gustavo;Gfeller, Aurelie;Farmer, Edward E.
通讯作者：
Farmer, Edward E.
研究单子叶小麦中水杨酸和茉莉酸信号通路的相互作用
影响因子：
2.7
作者：
Ding, Li-Na;Yang, Guo-Xing;Zhou, Yang
通讯作者：
Zhou, Yang