Geraniol: A Potential Defense-Related Volatile in “Baiye No. 1” Induced by Colletotrichum camelliae

Plants produce and emit a large variety of volatiles that have multiple defense-related functions in response to abiotic or biotic stresses. In comparison with studies on plant volatile–herbivore interactions, little research has been carried out volatile–microbe interactions. the present paper, tea volatile–Colletotrichum camelliae interactions were studied. The results emitted following infection C. “Baiye No. 1” showed healthy plants contained 68 kinds volatiles, while infected 76 volatiles. Five namely, geraniol, linalool, methyl salicylate, (E)-3-hexen-1-ol, α-farnesene, found relatively content variation plants, increments 7.903%, −2.247%, 2.770%, −6.728%, 3.848%, respectively. fungicidal activity five against geraniol had best activity, MIC MBC values 0.5 1 mg·mL−1, Thus, was selected for subsequent studies. effects mycelia cell structures investigated by scanning electron microscopy (SEM) transmission microscope (TEM). significantly disrupted, damaged. related enzymes assessed. cellulase increased, malondialdehyde defense inhibited, thereby inhibiting growth pathogens. This study provides first evidence is function volatile stress. It also valuable information enriches chemical ecology diseases field defensive substances microbe-induced