Koeleria macrantha and K. pyramidata (Poaceae): Nomenclatural Problems and Biological Distinctions

Arnow, Lois A.

doi:10.2307/2419708

Cited by 16 publications

(7 citation statements)

References 21 publications

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“…During meiotic course, seven bivalents have been counted at metaphase I. It is in conformity with the earlier reports from India and outside India (Frey 1993, Arnow 1994. It shows normal meiotic course resulting into high pollen fertility (98.45%).…”

Section: Family: Onagraceae Epilobium Alpinum Lsupporting

confidence: 89%

Cytomorphology of some species of the angiosperm from Kangra District, H.P., India

2013

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ABSTRACT. Male meiosis and pollen fertility have been studied in 31 angiospermic species belonging to 29 genera and eight families. During meiotic course, ten species are found to have anomalous meiotic course exhibiting the abnormalities in varying frequencies as Capillipedium assimile (chromatin stickiness, cytomixis), Phacelurus speciosus (chromatin stickiness, laggards, bridges, unoriented bivalents), Lolium remotum (cytomixis, laggards, bridges, micronuclei), Sisymbrium strictum (cytomixis, laggards, bridges), Ranunculus hyperboreus (cytomixis, laggards, bridges, micronuclei), Impatiens scabrida (laggards, bridges and abnormal microsporogenesis), Pennisetum alopecuroides (laggards and bridges), Phalaris minor (laggards, bridges, unoriented bivalents), Dactylis glomerata (late disjunction of bivalents). These abnormalities results in the reduction of pollen fertility of the plants.

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Section: Family: Onagraceae Epilobium Alpinum Lsupporting

confidence: 89%

Cytomorphology of some species of the angiosperm from Kangra District, H.P., India

2013

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“…The infected species studied here, Arabis holboellii var. Schultes (synonyms = K. nitida and K. cristata [Arnow 1994]). Rydberg, is a widespread herbaceous perennial in Arctic and montane regions of the northern hemisphere (Rollins 1941 ).…”

Section: Natural History and Localitiesmentioning

confidence: 99%

“…Infection of A. holboellii by P. monoica occurs in late summer from wind-borne basidiospores produced on the primary host (Roy and Bierzychudek 1993), the grass Koeleria macrantha (Ledeb.) Schultes (synonyms = K. nitida and K. cristata [Arnow 1994]). Within a few months of basidiospore germination and penetration of Arabis leaves, the hyphae invade the meristematic tissue and cause systemic infection.…”

Section: Natural History and Localitiesmentioning

confidence: 99%

A Plant Pathogen Influences Pollinator Behavior and May Influence Reproduction of Nonhosts

Roy¹

1996

Ecology

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Some plant pathogens attract pollinating insects and thus have the potential to influence the pollination of flowers, just as different flower species can influence one another's pollination. Showy, flower-like pseudoflowers caused by the rust fungus Puccinia monoica on Arabis holboellii (Brassicaceae) commonly co-occur with flowers of Anemone patens (Ranunculaceae). I evaluated the effects of pseudoflowers and anemone on each other's visitation, and the effect of pseudoflowers on the seed set of anemone. I expected that at low overall "flower" densities visitation would be facilitated in patches containing a mixture of these species. At low densities, pseudoflowers or flowers alone may be too rare to attract sufficient visitors, but the addition of the other species could make mixtures more attractive and thus increase visitation rates. At high densities I expected that "flowers" in mixtures would compete for pollinators because it is more energy efficient for pollinators to concentrate visits on the most rewarding species. I used artificial arrays to separate the effects of "flower" density and relative frequency on visitation. Local density was not a good predictor of the influence of one species on the other. Instead, visitation patterns depended most strongly on the kind of visitor (flies vs. bees). Visitation to A. patens by flies was facilitated by the presence of pseudoflowers at both high and low densities, whereas visitation to pseudoflowers was not significantly influenced by A. patens at either density. Local density affected visitation by bees, but relative frequency did not. In addition to observing visitation, I also quantified the effects of interspecific movement of both pollen and spores on the reproductive success of A. patens. Although the presence of pseudoflowers sometimes facilitates visitation to A. patens, this effect could be counterbalanced by competition through interspecific insect movement: sticky pseudoflowers remove pollen from visiting insects, and fungal spermatia deposited on flower stigmas reduce seed set.

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“…may be regarded as a synonym of K. macrantha (Ledeb.) J.A.Schultes, as in Humphries (1980) and in Arnow (1994), but Conert (1987) maintained K. cristata as the correct name for the species). The panicles of K. novozelandica are much more lax than the extremely shortly branched very dense panicles of K. cristata; glumes in K. novozelandica are subequal, but unequal in K. cristata with the lower glume much narrower than those in New Zealand plants.…”

Section: Holotype: W 22045! T F C[heesemanj Hookermentioning

confidence: 99%

KoeleriaPers. (Gramineae: Aveneae) in New Zealand

Edgar

Gibb

1999

New Zealand Journal of Botany

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Koeleria macrantha and K. pyramidata (Poaceae): Nomenclatural Problems and Biological Distinctions

Cited by 16 publications

References 21 publications

Cytomorphology of some species of the angiosperm from Kangra District, H.P., India

Cytomorphology of some species of the angiosperm from Kangra District, H.P., India

A Plant Pathogen Influences Pollinator Behavior and May Influence Reproduction of Nonhosts

KoeleriaPers. (Gramineae: Aveneae) in New Zealand

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