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Tahereh A. Aghajanzadeh Martin Reich Malcolm J. Hawkesford Meike Burow 《Archives of Agronomy and Soil Science》2019,65(7):945-956
Salinity as a major agricultural problem can affect crop growth and quality. Onion (Allium cepa L.) plant contains a wide variety of sulfur-containing compounds which may be involved in plant protection against salt stress. In the current study, a similar reduction in growth caused by chloride and sulfate salts was observed when onion was exposed to equimolar concentrations of Na+. Also, no difference was observed for shoot/root ratio and dry matter content of roots and shoots. Plants accumulated Na+ and the respective anions (chloride and sulfate) which in turn caused changes in the content of other nutrients. The content of potassium and calcium was decreased more than the other elements by both sodium salts. Sulfate salinity resulted in substantial increase in total sulfur and sulfate content but chloride salinity affected neither the total sulfur nor sulfate content of the roots and shoots, only in onion exposed to 200 mM chloride salt, those of roots and shoots were reduced. Furthermore, the water-soluble non-protein thiol content as well as the content of alliin remained rather unaffected. In conclusion, either salts affected the uptake and distribution of sulfate in onion, but had no or only a minor effect on the plant sulfur metabolism. 相似文献
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利用蒜汁和从鲜蒜中提取的蒜氨酸、蒜氨酸酶和蒜素,对交格链孢菌、指状青霉、灰霉、稻瘟病菌和意大利青霉进行了体外抑菌实验.采用平板打孔法和液体2倍稀释法.结果显示蒜汁和蒜氨酸酶、蒜氨酸+蒜氨酸酶、蒜素对5种试验菌都有明显的抑制作用.蒜氨酸+蒜氨酸酶对供试的五种植物病原真菌的抑菌效果最为显著,且抑菌效果与未经稀释的农药亮碘相当或是亮碘的1.4～2.4倍.蒜氨酸+蒜氨酸酶和蒜素对指状青霉、灰霉和意大利青霉具有很强的抑菌作用,其最小抑菌浓度(MIC)分别是0.09和0.5 mg/mL. 相似文献
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大蒜生理活性物质对几种植物病原真菌的体外抑菌活性 总被引：4，自引：0，他引：4
利用蒜汁和从鲜蒜中提取的蒜氨酸、蒜氨酸酶和蒜素,对交格链孢菌、指状青霉、灰霉、稻瘟病菌和意大利青霉进行了体外抑菌实验。采用平板打孔法和液体2倍稀释法。结果显示蒜汁和蒜氨酸酶、蒜氨酸+蒜氨酸酶、蒜素对5种试验菌都有明显的抑制作用。蒜氨酸+蒜氨酸酶对供试的五种植物病原真菌的抑菌效果最为显著,且抑菌效果与未经稀释的农药亮碘相当或是亮碘的1.4~2.4倍。蒜氨酸+蒜氨酸酶和蒜素对指状青霉、灰霉和意大利青霉具有很强的抑菌作用,其最小抑菌浓度(MIC)分别是0.09和0.5 mg/mL。 相似文献
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Thirty-five bacterial isolates, recovered from the healthy bulbs of Allium sativum that grow in different sites of China, were screened for their ability to produce hydrolytic enzymes and metabolites and to dissolve inorganic phosphorus in vitro. These 35 endophytes inhibited the growth of the causal agent of white rot disease, Sclerotium cepivorum (Sc), by 19–64%. The isolates 153 (Bacillus siamensis) (Bs) and 136 (Streptomyces setonii) (Ss) were found to be the most effective in decreasing Sc disease incidence, both by 66%. In addition, there was a significant enhancement in the growth of garlic plants pretreated with isolates 153 Bs and 136 Ss. Isolate 136 could not produce indole-3-acetic acid (IAA) and did not exhibit an inorganic phosphorus solubilization ability in vitro. Thus, growth promotion by this Streptomyces sp. is likely to be mediated by a different, and perhaps novel, mechanism to that typically associated with growth promoting bacteria. An increase in expression of alliin lyase 2 was found in garlic plants treated with 153 Bs. By extension, the quantity of the antimicrobial sulphoxide, alliin, was also increased in 153 Bs-treated and Sc-inoculated plants, relative to the Sc-inoculated controls. These results indicated that this bacterial endophyte might protect A. sativum not only by direct antibiosis, but also by enhancing the expression of alliin lyase 2 and the concomitant production of alliin. 相似文献
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