<institution content-type="university">College of Resources and Environment, Yunnan Agricultural University</institution>, <city>Kunming</city>, <country>China</country>.
Funct Plant Biol. 2023 Dec;50(12):1062-1072. doi: 10.1071/FP23052.
Allelopathy is the main reason for disease control in intercropping systems. The effects of different extracts, root secretions and phenolic acids of wheat and faba bean on Fusarium oxysporum f. fabae (FOF) growth were studied to explore the allelopathy mechanism of wheat in disease control of faba bean. Various extracts and root exudate of faba bean were promoted but those of wheat inhibited the growth and reproduction of FOF. High-performance liquid chromatography revealed significant differences in the contents of phenolic acids in the various extracts and root exudate of wheat and faba bean. The total content of syringic acid (SA) was much higher, but that of other five phenolic acids were lower in wheat than in faba bean. The in vitro addition of these phenolic acids revealed that cinnamic acid (CA), p-hydroxybenzoic acid (PHBA), benzoic acid (BA), vanillic acid (VA) and ferulic acid (FA) exhibited significant promoting effects and SA exhibited strong inhibitory effects on the growth of FOF. These results suggest that the inhibitory effect of various extracts and root exudates from wheat on FOF growth may be due to differences in phenolic acid content and high levels of SA.
化感作用是间作系统病害防治的主要原因。为了探究小麦在防治蚕豆根腐病中的化感作用机制，研究了小麦和蚕豆的不同提取物、根系分泌物和酚酸对尖孢镰刀菌（FOF）生长的影响。结果表明，各种提取物和蚕豆根系分泌物均促进 FOF 的生长和繁殖，而小麦则抑制 FOF 的生长和繁殖。高效液相色谱分析显示，小麦和蚕豆的各种提取物和根系分泌物中酚酸的含量存在显著差异。在小麦中的丁香酸（SA）总含量明显较高，但其他 5 种酚酸的含量则低于蚕豆。体外添加这些酚酸发现肉桂酸（CA）、对羟基苯甲酸（PHBA）、苯甲酸（BA）、香草酸（VA）和阿魏酸（FA）对 FOF 的生长表现出显著的促进作用，而 SA 对 FOF 的生长则表现出很强的抑制作用。这些结果表明，小麦的各种提取物和根系分泌物对 FOF 生长的抑制作用可能是由于酚酸含量的差异和 SA 含量较高所致。
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