As a synthetic functional analog of salicylic acid, 2,6-dichloroisonicotinic acid (INA) is effective in inducing the host disease resistance of a plant against a pathogen. The effects of INA on controlling postharvest blue and green molds and anthracnose decay and defense-related enzymes on citrus fruits were investigated, and the ascorbic acid of naturally infected citrus flavedo was also measured. Results showed that 1.0 mmol L⁻¹ INA treatments significantly reduced blue and green molds and anthracnose decay development on both wound-inoculated fruit and naturally-infected fruit compared with the control fruit. The treatment effectively enhanced the β-1,3-glucanase (GLU), chitinase (CHI), phenylalanine ammonia-lyase (PAL) and peroxidase (POD) activities and the polyphenol oxidase (PPO) in flavedo. The results presented here suggest that INA might be used as a chemical fungicide substitution to control postharvest diseases in citrus fruits.

作为水杨酸的合成功能类似物，2,6-二氯异烟酸（INA）可有效诱导植物抵抗病原体的宿主抗病性。研究了INA对控制柑橘果实采后蓝霉和绿霉以及炭疽病腐烂和防御相关酶的控制作用，还测定了自然感染的柑桔中的抗坏血酸。结果表明1.0 mmol L ^-1与对照水果相比，INA处理显着减少了伤口感染的水果和自然感染的水果上的蓝绿色霉菌和炭疽病的腐烂。该处理有效地增强了flavedo中的β-1,3-葡聚糖酶（GLU），几丁质酶（CHI），苯丙氨酸氨裂合酶（PAL）和过氧化物酶（POD）活性以及多酚氧化酶（PPO）。此处提供的结果表明，INA可用作化学杀真菌剂的替代品，以控制柑橘类水果的采后病害。