abscission

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However, circumstantial evidence exists that, for example, the petiolar scar of an abscised neuropterid frond left on a stem impression is somewhat oval in shape (Laveine and Brousmiche 1985), and that of an abscised alethopterid frond is somewhat similar (Pfefferkorn et al.
In abscised leaves, Tucker and colleagues found that cellulase mRNA occurs only in the two layers of cells on either side of the separation zone and in the vascular tissue that feeds the leaf.
Abscised leaves were collected and pooled with any leaves remaining on the plant.
Some plants had senescent or abscised cotyledons or early leaves.
Dead foliage on the trees remained attached to branches or had abscised, and black discoloration and small tunnels were observed in the sapwood of the stems.
Fruit set was calculated as the proportion of developing ovaries about 1 wk after the end of each flowering period, by which time aborted ovaries had abscised. Fruits were collected when mature, three to four wk after flowering, and were stored in 70% ethyl alcohol.
Because a stress frequently occurs over an extended time period, fruit is abscised from several continuous nodes and the result is a fruiting gap.
Of 589 flowers containing eggs, 67% set fruit and 21% of fruit abscised due to larvae, providing the cactus with a 4.8 benefit-to-cost ratio for interacting with Upiga virescens.
We further suggest that the use of N: P ratios derived from abscised foliage are potentially as useful as those from live foliage for purposes of understanding system and community distinctions, although the former have not been historically utilized to the same extent.
Living miners in prematurely abscised leaves are either rapidly consumed by predators (Mopper and Simberloff 1995) or die before pupation (Simberloff and Stiling 1987).
Because females search for hosts mainly on cotton plants and not on the ground, where the third instar host is often found in abscised floral buds, it is not considered to have potential in being an effective biological control agent of the boll weevil (Adams et al.
was selected because after this date we could not distinguish seedlings that died from survivors that abscised leaves during the late summer.