Some Problems of Pathological wilting in Plants

Electron microscopy of elm infected with Ceratocystis ulmi (Buism) C Moreau

“…Several general reviews are Gaumann (1951), Dimond (1955), Sadasivan (1961), Beckman (1964) and Dimond (1967). Few investigations have been concerned with Dutch elm disease and the amount of information that is applicable remains to be established.…”

Phytotoxic action of Endoconidiophora fagacearum Bretz

“…1947) are less perfectly known. Through these discoveries the postulated mechanism of action of toxins in wilt diseases has been modified to incorporate interactions of all these compounds in the wilt syndrome (Gaumann 1957). The solution to this problem has therefore become infinitely more complex.…”

“…While toxins, or vivotoxins (Dimond and Waggoner 1953a) have long been implicated in the wilt disease syndrome (Hutchinson 1913), unequivocal evidence of their existence in vivo had not been established until recently (Dimond and Waggoner 1953b;Gaumann 1957). Since the last comprehensive review of wilt induction (Dimond 1955), a wide variety of metabolic products have been implicated, particularly with reference to tomato wilt (Gaumann 1957) .…”

“…Formation arid func tion of some of these substances are well understood (Dimond ii and Waggoner 1953b;Gaumann 1957) . Many other compounds, fusarinic acid (Yabuta et al 1934), lycomarasmin (Gaumann 1951), and lateritun I ( Gaumann et_ al. 1947;Cook eft al.…”

“…Since the last comprehensive review of wilt induction (Dimond 1955), a wide variety of metabolic products have been implicated, particularly with reference to tomato wilt (Gaumann 1957) . Formation arid func tion of some of these substances are well understood (Dimond ii and Waggoner 1953b;Gaumann 1957) . Many other compounds, fusarinic acid (Yabuta et al 1934), lycomarasmin (Gaumann 1951), and lateritun I ( Gaumann et_ al.…”