CO OZNACZA SŁOWO POLLEN TUBE
Rurka pyłkowa
Pyłek kwiatowy jest częścią męskiego gametofita z roślin nasiennych. Działa jako przewód do transportowania męskich komórek gametowych z ziaren pyłków, zarówno od piętna, jak i do ovules u podstawy słupka, lub bezpośrednio przez tkanki jajowatych w niektórych gąsienicach. W przypadku kukurydzy ta pojedyncza komórka może wyrosnąć dłużej niż 12 cali w celu pokonania długości słupka. Rurki pyłków po raz pierwszy odkryły Giovanni Battista Amici.
Definicja słowa pollen tube w słowniku
Definicja łagiewki pyłkowej w słowniku to pusty, rurkowaty wyrostek, który rozwija się z ziarna pyłku po zapyleniu, wyrasta w stylu do zalążka i przenosi męskie gamety do komórki jajowej.
KSIĄŻKI POWIĄZANE ZE SŁOWEM «POLLEN TUBE»
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1
Competition Science Vision
Stages in callose plug formation in a growing pollen tube. (A) Initiation. (B)
Intermediate stage. (C) Lumen of the tube is completely sealed. The pollen tube
wall is 3-layered structure, with an outer pectin stratum, a middle pectocellulosic ...
2
Cell Biology of Plant and Fungal Tip Growth
The role of microtubules in organelle movement during pollen tube growth is still
unclear, although microtubule motor proteins have been identified. To
understand the specific role of microtubules in supporting the movement of
organelles, we ...
Anja Geitmann, Mauro Cresti, Ian Brent Heath,
2001
3
Peculiar structures occurring in the
pollen tube of Zamia
PKCULIAR STRUCTURES OCCURRING IN THE POLLEN TUBE OF ZAMIA. II
K R B K R T J. W K B K K R. (WITH PLaTE XL) The recent announcement by
Hirase1 of the occurrence of motile spermatozoids in Ginkgo biloba, and that bv ...
Herbert John Webber,
1897
4
Pollen Tube and Spermatogenesis in Iris ...
Mary Louise Sawyer. \i\\..9\\.'\%e SM» же'. Aal. I6 Flos. II-I8.-Abbreviations are as
follows: pg, pollen grain; t, tube nucleus; g, generative cell; т, 1па1е cell; e, egg;
fig. II, section of stigma with pollen grains, some of which are growing tubes, ...
5
Almond Production Manual
When pollen comes into contact with the receptive surface of the stigma, it
germinates to form a pollen tube. The tube protrudes through a germination pore
in the pollen grain and grows between the cells of the stigma, into the style, and
down ...
Warren C. Micke, University of California (System). Division of Agriculture and Natural Resources,
1996
6
Competition Science Vision
The mucilagenous secretion is largely a water soluble carbohydrate and it aids
the pollen tube growth both mechanically as well as chemotropically. Again a
special structure which facilitates the entry of pollen tube into the ovule is the ...
After pollen tube travels to several hundred microns in the style, the top of pollen
tube is full of dense cytoplasm in which it contains a nutrition nucleus and two
sperms, while the upper part of pollen tube produces callose that separates
pollen ...
8
Notes on the Fecundation of Zamia and the
Pollen Tube ...
VOLUME XXIV NUMBER 4 Botanical Gazette OCTOBER i891 NOTES ON THE
FECUNDATION OF ZAMIA AND THE POLLEN TUBE APPARATUS OF GINKGO.
II K R B K R T J. W EJJSr, (WITH PLATE x) A preliminary discussion of the ...
Herbert John Webber,
1897
When it germinates, pollen emits a pollen tube, the length of which is measured
in "diameters", namely pollen diameter. A pollen grain is regarded as having
germinated when pollen tube length exceeds one diameter. The pollen is
germinated ...
Amots Dafni, Michael Hesse, Ettore Pacini,
2000
10
INTERNATIONAL REVIEW OF CYTOLOGY
In the compatible pistil the pollen tube is able to switch from autotrophic to
heterotrophic growth during its journey through the tissues of the pistil, while
pollen tube growth in vitro and in incompatible pistils ceases when stored
reserves are ...
Geoffrey H. Bourne, Kenneth L. Giles, Jatendra Prakash,
1987
WIADOMOŚCI, KTÓRE ZAWIERAJĄ SŁOWO «POLLEN TUBE»
Sprawdź, o czym dyskutuje się w prasie krajowej i zagranicznej oraz jak jest stosowane słowo
pollen tube w wiadomościach.
Will the wet conditions hurt pollination?
However, the pollen grain starts growth of the pollen tube down the silk channel within minutes of coming in contact with a silk and the pollen ... «Ohio's Country Journal and Ohio Ag Net, Lip 15»
Researchers receive 2.6 million euros to study evolution of sexual …
... the researchers intend to study the evolution of regulatory networks important for male and female gamete development, pollen tube growth ... «News-Medical.net, Lip 15»
Is Space Sex the Final Frontier?
When the pollen cell lands on the female part of a plant, it grows what's called a pollen tube. It looks like a little finger. That finger burrows into ... «NBC 10 Philadelphia, Cze 15»
The final frontier: Space sex
The pollen tube's the fastest growing cell in the plant kingdom—sometimes plants need to get it on really fast. And Chebli and Geitmann started ... «Newsworks.org, Cze 15»
Northwest Michigan fruit regional report – May 19, 2015
If the bees have successfully accomplished their jobs, we hope temperatures were favorable to allow pollen tube growth down to the ovule to ... «Michigan State University Extension, Maj 15»
miRVine: a microRNA expression atlas of grapevine based on small …
This enzyme is involved in the modification of the plasma membrane during pollen tube elongation. In agreement with this putative role, ... «BMC Blogs Network, Maj 15»
Cell Fusion Ensures Only One Sperm Gets Through
The present study shows that cell fusion induces the selective elimination of the cell responsible for pollen tube attraction after successful ... «Asian Scientist Magazine, Maj 15»
Cell fusion 'eats up' the 'attractive cell' in flowering plants
Upon successful pollination on the stigma, the pollen tube grows down through the pistil towards the ovary. The mature ovule in most flowering ... «Phys.Org, Kwi 15»
Take the guesswork out of thinning
Scientists at Virginia Tech, who have spent over a decade studying pollen tube growth, developed a temperature-based, variety-specific model ... «Good Fruit Grower, Mar 15»
McMillan: Arrival of pollen brings promise of spring, more trees
Once the two come together, the pollen grain forms a microscopic pollen tube that grows slowly toward the egg cell buried deep within the ... «Hilton Head Island Packet, Mar 15»