Sulfur Fertilization and Fungal Infections Affect the Exchange of H2S and COS from Agricultural Crops
Sulfur Fertilization and Fungal Infections Affect the Exchange of H2S and COS from Agricultural Crops
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DOI：
10.1021/jf301912h
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发表时间：
2012-08-08
影响因子：
6.1
通讯作者：
Schnug, Ewald
中科院分区：
文献类型：
--
作者：
Bloem, Elke;Haneklaus, Silvia;Schnug, Ewald
植物气态硫化合物的排放与植物体内硫素状况或真菌感染等多种因素有关。硫化氢（H2S）的释放或吸收取决于环境空气浓度和工厂对S的需求。相反，羰基硫（COS）通常被植物吸收。在温室条件下，研究了油菜（Brassica napus L.）对油菜菌核病菌的侵染作用进行了研究。硫醇含量进行了测定，以了解其对气态S化合物交换的影响。实验表明，H2S排放量与病原菌感染以及S营养密切相关。施硫后，每盆土壤中硫的含量从缺硫油菜的H2S消耗量增加到41 pg g（-1）（dw）min（-1）。真菌感染导致H2S排放量更强的增加，感染后2天最大值为1842 pg g（-1）（dw）min（-1）。健康的油菜植物充当COS的库。真菌感染引起从COS吸收到COS释放的转变。因此，含硫气体的释放似乎是真菌感染反应的一部分。含硫气体可能在此响应中发挥的作用进行了讨论。
The emission of gaseous sulfur (S) compounds by plants is related to several factors, such as the plant S status or fungal infection. Hydrogen sulfide (H2S) is either released or taken up by the plant depending on the ambient air concentration and the plant demand for S. On the contrary, carbonyl sulfide (COS) is normally taken up by plants. In a greenhouse experiment, the dependence of H2S and COS exchange with ambient air on the S status of oilseed rape (Brassica napus L.) and on fungal infection with Sclerotinia sclerotiorum was investigated. Thiol contents were determined to understand their influence on the exchange of gaseous S compounds. The experiment revealed that H2S emissions were closely related to pathogen infections as well as to S nutrition. S fertilization caused a change from H2S consumption by S-deficient oilseed rape plants to a H2S release of 41 pg g(-1) (dw) min(-1) after the addition of 250 mg of S per pot. Fungal infection caused an even stronger increase of H2S emissions with a maximum of 1842 pg g(-1) (dw) min(-1) 2 days after infection. Healthy oilseed rape plants acted as a sink for COS. Fungal infection caused a shift from COS uptake to COS releases. The release of S-containing gases thus seems to be part of the response to fungal infection. The roles the S-containing gases may play in this response are discussed.