Wound Responses of Ficus australis

Jump, John A.

doi:10.2307/2480958

Cited by 3 publications

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“…The demonstration that even guard cells and other epidermal cells may divide under such conditions is particularly remarkable in view of reports to the contrary (Wylie 1930(Wylie , 1931Jump 1936). Kaszner (1 9 10) and Woit (1 925) found epidermal cells dividing in wound margins of immature leaves.…”

Section: Totipotency Of the Leaf And Its Componentsmentioning

confidence: 95%

Wound regeneration in the lamina of magnoliaceous leaves

Tucker¹

1975

Can. J. Bot.

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Reparative tissue was observed around healed natural wounds in leaves of 53 species of 9 of the 12 magnoliaceous genera: Aromadendron, Elmerrillia, Kmeria, Liriodendron, Magnolia, Manglietia, Michelia, Paramichelia, and Talauma. Additional evidence was obtained from wounding experiments carried out on attached leaves of two evergreen species, Magnolia grandiflora and Michelia figo. Regeneration was studied over a 6-week period. Evergreen leaves produced more abundant regenerative tissues than deciduous leaves; a narrow-to-broad periderm forms consistently in all evergreen magnoliaceous leaves around wounds, but wounds in the deciduous species invoke little or no periderm development. The healing process in these leaves consists of three steps: (1) cells die along the wound, and cells immediately adjacent become physiologically altered; (2) a callus forms by randomly oriented cell divisions throughout mesophyll, vein sheath, and (in most species) epidermis; and (3) a periderm eventually forms in the band of callus parallel to the wound. The complete process takes 4 to 6 weeks in the evergreen magnoliaceous plants studied. The differences in healing processes are contrasted between evergreen and deciduous leaves. Of special interest is the observation that guard cells of mature leaves in several taxa dedifferentiate and undergo division in the area of wound repair.

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Section: Totipotency Of the Leaf And Its Componentsmentioning

confidence: 95%