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The study aims to investigate the vascular immunity mechanisms of a resistant cotton cultivar against Verticillium dahliae infection.

February 13, 2026Annals of Botany

Resistant cotton maintains vascular health via an integrative defense network against Verticillium dahliae

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Demonstrates enhanced vascular immunity in resistant cotton, indicating a defense mechanism against infection.

The study aims to investigate the vascular immunity mechanisms of a resistant cotton cultivar against Verticillium dahliae infection.
Histopathological analysis of xylem colonization patterns
Assessment of physiological stability through electrolyte leakage and malondialdehyde levels
Localization of reactive oxygen species and callose deposition
Evaluation of SA/JA signaling gene activation
Susceptible cultivar JM11 showed severe wilting and high colonization rate (51.7%) at 16 dpi with significant vascular collapse.
Resistant cultivar ZZM2 had only mild symptoms (26% disease index) and restricted colonization (28.7%) with intact pit membranes.
ZZM2 exhibited higher tannin and lignin content, contributing to resilience.
Mechanisms included preservation of xylem integrity, early ROS bursts, and activated defense signaling pathways.

Peng et al. (2026) studied this question.

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