Anthracnose is a severe disease of mango caused by Colletotrichum gloeosporioides Penz. The antifungal effects of the aroma compounds (trans-cinnamaldehyde, citral, and phenylacetaldehyde) were tested against the pathogen. These compounds exhibited complete inhibition of visual spore germination and the mycelial growth under in vitro conditions. Complete inhibition of mycelial growth of C. gloeosporioides was observed by trans-cinnamaldehyde (TCA) at 500 mg L⁻¹ followed by citral (CT) at 750 mg L⁻¹ and phenylacetaldehyde (PAA) at 2000 mg L⁻¹. The effect of aroma compounds on the morphology and membrane lesion of C. gloeosporioides mycelia was studied through scanning electron microscopy (SEM). SEM observations revealed withered hyphae. Further experiments confirmed that aroma compounds inhibited the ergosterol synthesis and also triggered the membrane-active mechanism. Results on testing the efficacy of the aroma compounds through the fungal pectinase inhibition study confirmed that these aroma compounds have potential to damage plasma membrane integrity and cause membrane lesion of C. gloeosporioides, thereby causing the delayed anthracnose incidence in treated mango fruits as compared to control fruits. The antifungal activity of these aroma compounds could be attributed to the disruption of membrane integrity and leakage of cellular components. Results of the in vivo study showed that postharvest treatment of these compounds revealed that both disease incidence and severity efficiently managed in a dosage-dependent manner. The aroma compounds TCA, CT, and PAA might be an excellent natural and biodegradable bio-fungicides for the control of anthracnose disease in mango after harvest.

中文翻译：

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香气化合物对芒果炭疽病采后管理的功效

炭疽病是由Colletotrichum gloeosporioides Penz引起的一种严重的芒果病。测试了香气化合物（反式肉桂醛，柠檬醛和苯乙醛）的抗真菌作用。这些化合物在体外条件下显示出对可见孢子萌发和菌丝体生长的完全抑制作用。通过在500 mg L ^-1的反式肉桂醛（TCA），然后在750 mg L ^-1的柠檬醛（CT）和在2000 mg L ^-1的苯乙醛（PAA），可以完全抑制球孢梭菌的菌丝体生长。香气化合物对C. gloeosporioides形态和膜损伤的影响通过扫描电子显微镜（SEM）研究菌丝体。扫描电镜观察发现菌丝枯萎。进一步的实验证实，香气化合物抑制了麦角固醇的合成并触发了膜活性机制。通过真菌果胶酶抑制研究测试香精化合物功效的结果证实，这些香精化合物可能会破坏质膜的完整性，并导致球孢梭菌的膜损伤。与对照果实相比，在处理过的芒果果实中引起炭疽病的发生延迟。这些芳香化合物的抗真菌活性可以归因于膜完整性的破坏和细胞成分的泄漏。体内研究的结果表明，对这些化合物的收获后治疗表明，疾病的发生率和严重性均以剂量依赖性方式得到有效控制。芳香化合物TCA，CT和PAA可能是一种极好的天然和可生物降解的生物杀菌剂，可用于控制芒果收获后的炭疽病。