Lenticel and Water Root Development of Swamp Tupelo Under Various Flooding Conditions

摘要: Seedlings of swamp tupelo (Nyssa sylvatica var. biflora [Walt.] Sarg.) were grown in nonflooded soil or that was intermittently flooded, continuously surface-saturated with moving stagnant water. Lenticels on seedlings round, only slightly hypertrophied, and had few closing layers. Degree hypertrophy number layers per lenticel increased surface saturation intermittent flooding, but absent under continuous flooding. Flooded lenticels remained nearly round despite variations hypertrophy. In all treatments, intercellular spaces abundant the complementary tissue phellogen because spherical shape these cells. Although continuity interrupted anastomosed, breaks within prevented from being completely blocked. Water roots developed primarily flooding water, some apparently originating beneat...