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Leaf abscission zones in molinia caerulea l. moench the purple moor grass

Leaf abscission zones in molinia caerulea l. moench the purple moor grass

Annals of Botany 62(4): 429-434

Leaf separation and loss in the grass Molinia caerulea (L.) Moench was investigted using scanning electron microscopy. Leaf senescence and subsequent shedding of leaves was preceded by the formation of a leaf abscission zone. The zone contains cells which have more than doubled their wall thickness to greater than 0.4 .mu.m. The line of fracture associated with the zone principally followed the middle lamellae, leaving intact cells on the fracture faces. Molinia should prove an interesting model in which to study abscission processes in the Gramineae.

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