The present study investigated the impact of drought stress (control and drought) around pollination
and foliar sprays of potassium (K; 0, 1, 2 and 5% K2SO4) on leaf K concentrations and yield determinants of maize under greenhouse and field conditions.
are able to generate self-fertilization probably because the first self-pollination
neutralizes glycoproteins, so that subsequent pollinations
may generate pollen tubes capable of fertilizing the embryo sac.
These floristic characters are thought to be the result of selection for efficient attraction of and pollination
by a particular functional group of pollinators (Faegri and van der Pijl, 1979; Fenster et al, 2004).
restricted with paper and with tulle produced fruits with heavier seeds and a larger amount of seeds in the fruit (Table 3).
In controlled pollinations
involving banana and plantain, FORTESCUE & TURNER (2005c) reported that seed production was low, in the order of 1 to 5 seeds per 100 fruits, considering that each ovary could contain at least 300 ovules.
Fifty mature buds, five each from ten inflorescences on five trees were bagged a day before anthesis without manual self pollination
to know whether fruit set occurs through autogamy.
Longevity of flowers may be influenced by timing of pollination
, mating system, and growth form (Devlin and Stephenson, 1984; primack, 1985; stratton, 1989; schoen and Ashman, 1995; clayton and Aizen, 1996).
In 1993, kernel set declined for pollinations
between 4 and 8 DAFS for WF9 x A632, after 8 DAFS for 3343, while B73 x MO17 and 3379 again maintained maximum kernel set at 10 DAFS (Fig.
Nonetheless, individual pollen loads are usually below levels that provide higher probability of retention, and commonly observed geitonogamous pollinations
also appear to conflict with expected strong selection on moths to provide pollinations
that give high retention probability.
Test samples consisted of 30 self pollinations
and 30 cross pollinations
drops are involved at some point in the capture and delivery of pollen into ovules, followed by pollen germination and fertilization (Gelbart & von Aderkas, 2002).
Especially, the germination of grape seeds obtained from self pollinations
are usually lower than those from open or cross pollinations