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Stomatal Droplets and the Penetration of Leaves by Plant Pathogens

J. G. Bald
American Journal of Botany
Vol. 39, No. 2 (Feb., 1952), pp. 97-99
Stable URL: http://www.jstor.org/stable/2438174
Page Count: 3
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Stomatal Droplets and the Penetration of Leaves by Plant Pathogens
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Abstract

Observations and experiments in a semi-arid climate indicate that drops of water may be exuded through the stomata of gladiolus leaves. Development of stomatal droplets occurs when the atmosphere is cool and humid and the soil is warm and moist. Stomatal droplets induce the germ tubes of leaf-invading fungi to pass into the stomata and infect the leaf. The droplets may be retracted, and draw bacteria from the leaf surface into sub-stomatal cavities and intercellular spaces.

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