Effects of White Root Rot Disease on Hevea brasiliensis (Muell. Arg.) – Challenges and Control Approach

Abstract

Cell walls of sugar beet tissue (Beta vulgaris var altissima Döll), the cell and vacuolar membrane of which were destroyed by heat or the action of lipophilic substances, were observed by transmission electron microscopy. The average thickness of secondary walls (SW) and the region composed of the middle lamella and two primary walls (PW) was statistically evaluated and compared with the swelling of the entire denaturated tissue. By introducing different counter‐ions with water as solvent, the extension along the wall E2 increased in the order H+ < K+ ∼ Ca2+ < La3+, and the extension across the wall (SW plus PW) E2 increased in the order Ca2+ ∼ K+ < La3+