Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Willard W. Payne"'
Autor:
Willard W. Payne
Publikováno v:
Review of Palaeobotany and Palynology. 35:39-59
Observations and measurements from angiosperm species in more than 150 genera from 15 monocotyledonous and 69 dicotyledonous families show that harmomegathy, changes in size, shape, and volume of pollen grains as a result of water loss or intake are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::142a4780f1b347c7e7087e21e0f5eba8
https://doi.org/10.1016/0034-6667(81)90013-0
https://doi.org/10.1016/0034-6667(81)90013-0
Autor:
Willard W. Payne
Publikováno v:
TAXON. 28:117-132
The history of study and nomenclature of stomatal concepts has not yet led to full elucidation of cell pattern significance for higher plants. In this paper, a new ontogenetic system of classification is introduced that makes primary subdivision on t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16b8c416d857d9d4baabdae7b5ecf4c2
https://doi.org/10.2307/1219566
https://doi.org/10.2307/1219566
Publikováno v:
American Journal of Botany. 61:580-584
A B S T R A CT ferentiation, the guard cells of mutant plants deteriorate, leaving the mature stomata with only the two subsidiary cells. The subsidiary cells in stomata of mutant leaves are similar to those of normal leaves with respect to their cap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7b8c4ae864b091eb0cbc6e11d508b74
https://doi.org/10.1002/j.1537-2197.1974.tb12278.x
https://doi.org/10.1002/j.1537-2197.1974.tb12278.x
Autor:
Willard W. Payne, John J. Skvarla
Publikováno v:
Grana. 10:89-100
This study presents a detailed survey and discussion of the fine structure of Ambrosia pollen. Representatives from all evolutionary groups and geographical regions are used, including 37 species and four hybrids. No significant differences are found
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::402ca715d1c37d9258637aa2ff9b8f07
https://doi.org/10.1080/00173137009427389
https://doi.org/10.1080/00173137009427389
Autor:
Willard W. Payne, Robert A. Evers
Publikováno v:
TAXON. 20:597-602
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d17bdfcd9ad8d7b26609d6ba65c22ca
https://doi.org/10.1002/j.1996-8175.1971.tb03182.x
https://doi.org/10.1002/j.1996-8175.1971.tb03182.x
Autor:
Willard W. Payne
Publikováno v:
Grana. 12:93-98
Measurements and observations of pollen grains of varying structure before and after dehiscence of the anther sac illustrate large magnitudes of harmomegathic changes in volume and shape. Such changes are compared for colpate, porate, and colporate g
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d4cd7f7dfb15308e19dbfb304e40a00
https://doi.org/10.1080/00173137209428832
https://doi.org/10.1080/00173137209428832
Publikováno v:
American Journal of Botany. 51:419-424
A B S T R A C T New chromosome observations are reported for 30 species and varieties from 4 genera of Ambrosieae: Ambrosia (including Franseria), Dicoria, Hymenoclea and Iva. Neither polyploidy nor aneuploidy is known in the genera Dicorea, Hymenocl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f68a49c02e732cfeb3dbdd1f45c1972
https://doi.org/10.1002/j.1537-2197.1964.tb06651.x
https://doi.org/10.1002/j.1537-2197.1964.tb06651.x
Publikováno v:
American Journal of Botany. 55:316-324
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ae9ae05fb319be898865f03079834f3
https://doi.org/10.1002/j.1537-2197.1968.tb07383.x
https://doi.org/10.1002/j.1537-2197.1968.tb07383.x
Publikováno v:
Biochemical Systematics and Ecology. 1:21-33
Specimens of the variable strand ragweeds of the Pacific Coasts of North and South America have commonly been divided among two or more specific or subspecific taxa. The results of this study indicate that they comprise a single heteromorphic and che
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0eb2aa54bd571305c2ed1d2e8676c909
https://doi.org/10.1016/0305-1978(73)90031-8
https://doi.org/10.1016/0305-1978(73)90031-8
Publikováno v:
Biochemical Systematics and Ecology. 1:13-20
A study of a large number of populations of Ambrosia chamissonis ranging from Southern California to British Columbia, has disclosed chemical differences within the species. Six germacranolides, in addition to chamissonin, have been found in the vari
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa8ff5c18ef6fb52df17ee84e0435222
https://doi.org/10.1016/0305-1978(73)90030-6
https://doi.org/10.1016/0305-1978(73)90030-6