Requirements for division of the generative nucleus in cultured pollen tubes ofNicotiana

PROTOPLASMA ◽  
1993 ◽  
Vol 174 (3-4) ◽  
pp. 101-115 ◽  
Author(s):  
S. M. Read ◽  
A. E. Clarke ◽  
A. Bacic
Keyword(s):  
Pollen Tubes ◽  
Generative Nucleus

scholarly journals Autoradiographs of Pollen Tube Nuclei with Calcium-45

1959 ◽  
Vol 6 (3) ◽  
pp. 339-342 ◽  
Author(s):  
Dale Steffensen ◽  
John A. Bergeron
Keyword(s):  
Pollen Tube ◽  
Growth And Development ◽  
Lilium Longiflorum ◽  
Pollen Tubes ◽  
Mitotic Division ◽  
Generative Nucleus ◽  
Tube Nucleus ◽  
Easter Lily ◽  
Nuclear Component ◽  
Sperm Nuclei

Autoradiography with Ca45 has been used to obtain information about the relation between calcium and chromosomes. Labelled pollen from the Easter lily, Lilium longiflorum, was allowed to develop into pollen tubes between 5 and 6 cm. long in the styles of non-radioactive flowers. All of the nuclei, namely the tube nucleus and the two sperm nuclei, retain Ca45 after this period of growth and development. Since the two sperm nuclei have formed during this interval by the mitotic division of the generative nucleus and growth of the tube has occurred under the influence of the tube nucleus, it is inferred that the calcium was bound in a stable nuclear component, the chromosomes.

scholarly journals The effect of oleander glycosides on the germination of pollen grains and the mitosis of the generative nucleus in Tradescantia bracteata Small and Allium cepa L.

2015 ◽  
Vol 44 (3) ◽  
pp. 451-460 ◽  
Author(s):  
J. A. Tarkowska
Keyword(s):  
Allium Cepa ◽  
Water Solution ◽  
Pollen Grains ◽  
Pollen Tubes ◽  
Nerium Oleander ◽  
Generative Nucleus ◽  
Effect Of Water ◽  
Allium Cepa L ◽  
Germination Of Pollen

The effect of water solution of a mixture of glycosides from oleander (<i>Nerium oleander</i> L.) on the germination of pollen grains and on the mitosis of the generative nucleus in <i>Tradescantia bracteata</i> Small and <i>Allium cepa</i> L. has been studied. An inhibition of the germination and of the growth of pollen tubes was observed, proportionally to the concentration of glycosides. The pollen grains of <i>A. cepa</i> are more sensitive. The disturbances in mitosis lead to the formation of two or more uneven-sized doughter nuclei, or to the formation of restitution nuclei. These anomalies are more numerous in <i>T. bracteata</i>. From these results d t appears that pollen grains of <i>A. cepa</i> are characterized by a generally high physiological sensitivity and a small mitotic sensitivity, wheras for <i>T. bracteata</i> the opposite is true.

scholarly journals Villin controls the formation and enlargement of punctate actin foci in pollen tubes

2020 ◽  
Vol 133 (6) ◽  
pp. jcs237404 ◽  
Author(s):  
Wanying Zhao ◽  
Xiaolu Qu ◽  
Yuhui Zhuang ◽  
Ludi Wang ◽  
Maurice Bosch ◽  
...  
Keyword(s):  
Pollen Tubes

Keeping pollen tubes on track

Nature Plants ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 51-52 ◽  
Author(s):  
Yan Ju ◽  
Sharon A. Kessler
Keyword(s):  
Pollen Tubes
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