User:OGUNTOYE EBENEZER/Plant papillae

PAPILLAE
This are short protuberances,swelling or outgrowth from the epidermis in surface view,they may be round elongated,centric or eccentric or lie in series to each other

FUNCTIONS OF PAPILLAE
 * 1) Harvesting or collection of water from the atmosphere to wet the soil.The leaf surface covered with papillae appears on a landscape of mountains and valleys.
 * 2) They also increase reflection of radiation from leaf surfaces,reducing or lowering the temperature of the leaf tissue.Thereby encouraging condensation of water on the leaf surfaces,just as water condenses on a glass of cold water.
 * 3) The nature of the first line of defence in cereals is still something of a mystery despite many years of study. We know much but there is still much to learn. Wei and colleagues have previously developed Triticum monococcum L. (Einkorn, a diploid wheat) as an excellent model system to use as an alternative to barley. In this issue,a forward genetic approach to study the role of papilla components in Einkorn wheat infected with the powdery mildew fungus Blumeria graminis. The result is compelling evidence that lignification of papillae plays an important role in defence against penetration by this fungus..