Differential cold sensitivity of pollen grain germination in two Prunus species

Euphytica ◽  
1984 ◽  
Vol 33 (2) ◽  
pp. 419-426 ◽  
Author(s):  
S. A. Weinbaum ◽  
D. E. Parfitt ◽  
V. S. Polito
Keyword(s):  
Pollen Grain ◽  
Cold Sensitivity ◽  
Prunus Species ◽  
Pollen Grain Germination

scholarly journals In vitro Pollen Grain Germination and Tube Growth of Ten Iranian Jujube (Ziziphus jujuba) Cultivars

2014 ◽  
Vol 6 (2) ◽  
Author(s):  
Hossein ROUHAKHSH ◽  
Gholamhossein DAVARYNEJAD ◽  
Majid RAHEMI ◽  
Bahram ABEDI
Keyword(s):  
Pollen Grain ◽  
Tube Growth ◽  
Pollen Grain Germination ◽  
Ziziphus Jujuba

scholarly journals Pollen grain germination and fruit set in 'Brazilian seedless' sugar apple (Annona squamosa L.)

2012 ◽  
Vol 12 (4) ◽  
pp. 277-280 ◽  
Author(s):  
Hellenn Thallyta Alves Mendes ◽  
Márcia Regina Costa ◽  
Silvia Nietsche ◽  
João Alison Alves Oliveira ◽  
Marlon Cristian Toledo Pereira
Keyword(s):  
Fruit Set ◽  
Pollen Grains ◽  
Pollen Grain ◽  
Pollen Grain Germination ◽  
Artificial Pollination ◽  
Randomized Design ◽  
Self Fertilization ◽  
Completely Randomized Design ◽  
Fruit Formation

The purpose of this study was to evaluate fruit set and pollen grain germination of 'Brazilian seedless' sugar apple. Two experiments were performed: 1) one in a completely randomized design with three treatments (natural and artificial pollination and self-fertilization), with three replications of 10 flowers per plot, 2) and the other in a completely randomized design with three treatments: pollen grains of a seeded wild-type, 'Brazilian seedless' and atemoya (hybrid of sugar apple and cherimoya) 'Gefner', with five replications. A fruit set of 100% was achieved by artificial pollination. No fruit formation was observed after self-fertilization. The percentage of pollen grain germination in vitro was highest for 'Brazilian seedless' (52.5%) and lowest for cultivar Gefner (5.9%). Preliminary results indicated that pollen grains of 'Brazilian seedless' are viable and that natural or artificial pollination is essential for fruit set.

POLLEN GERMINATION AND CHILLING SENSITIVITY IN TWO TOMATO CULTIVARS OF DIFFERING SENSITIVITY TO COOL NIGHT TEMPERATURE

1982 ◽  
Vol 62 (3) ◽  
pp. 765-770 ◽  
Author(s):  
N. P. A. HUNER ◽  
R. B. VAN HUYSTEE
Keyword(s):  
Low Temperature ◽  
Pollen Tube ◽  
Pollen Grains ◽  
Pollen Grain ◽  
Differential Rate ◽  
Night Temperature ◽  
Pollen Grain Germination ◽  
Chilling Sensitivity ◽  
Tomato Cultivars ◽  
Cool Night

The effect of low night temperature on pollen tube formation and chilling sensitivity was compared in two tomato cultivars, Ontario 7515, free-setting at low temperature, and Ohio MR13, poor-setting at low temperature. The rate and extent of pollen grain germination in the Ontario 7515 cultivar far exceeded that of pollen grains obtained from the Ohio MR13 cultivar. In addition, the rate of pollen tube growth was greater in the free-setting cultivar than the poor-setting cultivar. No major differences were observed in the chilling sensitivity of the vegetative parts of these two tomato cultivars. It is concluded that the differential ability of these two tomato varieties to set fruit during growth at cool, night temperatures may be a function of differential flower production and a differential rate of pollen grain germination rather than a differential chilling sensitivity of the vegetative plant.

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