Aeciospore ejection in the rust pathogen Puccinia graminis is driven by moisture ingress.
Aeciospore ejection in the rust pathogen Puccinia graminis is driven by moisture ingress.
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DOI：
10.1038/s42003-021-02747-1
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发表时间：
2021-10-22
影响因子：
5.9
通讯作者：
Saunders DGO
中科院分区：
文献类型：
--
作者：
Bueno-Sancho V;Orton ES;Gerrity M;Lewis CM;Davey P;Findlay KC;Barclay E;Robinson P;Morris RJ;Blyth M;Saunders DGO
真菌已经进化出一系列的孢子释放和传播过程。在这里，我们开发了一个理论模型，解释了喷射机制的锈孢子解放秆锈病病原体小麦柄锈菌。锈孢子是从其Berbery主机上形成的簇杯释放出来的，将早期的接种物传播到邻近的小谷类作物中。我们的模型说明，在露水或降雨，锈孢子膨胀度的变化施加大量的力量在相邻的锈孢子在集群杯，而孢子之间的差距变得充满水。这种灌注使锈孢子表面覆盖一层润滑膜，便于排出，单个锈孢子的速度可达0.053至0.754 m·s−1。我们还使用了锈孢子源强度估计来模拟锈孢子传播梯度，并将其纳入一个公开的Web界面。这有助于农民和立法者评估当前当地的传播风险，并促进复杂的流行病学模型的发展，以潜在地减少源于Berkovich的茎锈病流行。Bueno-Sancho等人使用高速摄像和数学建模来研究茎锈菌的锈孢子传播机制。他们的模型表明，锈孢子弹射是由包被破裂和水分进入驱动的，传播预测被封装在网络界面中，以帮助评估疾病传播到附近谷类作物的风险。
Fungi have evolved an array of spore discharge and dispersal processes. Here, we developed a theoretical model that explains the ejection mechanics of aeciospore liberation in the stem rust pathogen Puccinia graminis. Aeciospores are released from cluster cups formed on its Berberis host, spreading early-season inoculum into neighboring small-grain crops. Our model illustrates that during dew or rainfall, changes in aeciospore turgidity exerts substantial force on neighboring aeciospores in cluster cups whilst gaps between spores become perfused with water. This perfusion coats aeciospores with a lubrication film that facilitates expulsion, with single aeciospores reaching speeds of 0.053 to 0.754 m·s−1. We also used aeciospore source strength estimates to simulate the aeciospore dispersal gradient and incorporated this into a publicly available web interface. This aids farmers and legislators to assess current local risk of dispersal and facilitates development of sophisticated epidemiological models to potentially curtail stem rust epidemics originating on Berberis. Bueno-Sancho et al. use high-speed videography and mathematical modelling to examine aeciospore dispersal mechanics of the stem rust fungus Puccinia graminis. Their model shows that aeciospore ejection is driven by peridium rupture and moisture ingress, with dispersal projections encapsulated in a web interface to help assess risk of disease spread to nearby cereal crops.
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影响因子：
6.2
作者：
Aylor, DE
通讯作者：
Aylor, DE
影响因子：
0.5
作者：
Ahmed, Maqsood;Anjum, Muhammad Akbar;Hussain, Sajjad
通讯作者：
Hussain, Sajjad
DOI：
10.1073/pnas.1913752117
发表时间：
2020-03-10
影响因子：
11.1
作者：
Oneto, Daniele Lagomarsino;Golan, Jacob;Seminara, Agnese
通讯作者：
Seminara, Agnese
DOI：
10.1073/pnas.1820318116
发表时间：
2019-03-12
影响因子：
11.1
作者：
Kim, Seungho;Park, Hyunggon;Jung, Sunghwan
通讯作者：
Jung, Sunghwan
影响因子：
18
作者：
Meyer, M.;Cox, J. A.;Gilligan, C. A.
通讯作者：
Gilligan, C. A.