Cytotaxonomy of the large Asteliads (Liliaceae) of the North Island of New Zealand

Wheeler, Jocelyn M.

doi:10.1080/0028825x.1966.10443957

Cited by 16 publications

(19 citation statements)

References 3 publications

(1 reference statement)

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“…Genome sizes in the species-poor families do not exceed 1C = 8 pg. This is generally supported by chromosomal data as none of the smaller families is characterized by large chromosomes, and in Asteliaceae, where counts up to 2n = 210 have been reported, the chromosomes are noted to be very small [103]. The only possible exception is Hypoxidaceae in which Hypoxis obtusa is reported to have 2n = 210 [104].…”

Section: 7mentioning

confidence: 64%

Genome Size Dynamics and Evolution in Monocots

et al. 2010

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Monocot genomic diversity includes striking variation at many levels. This paper compares various genomic characters (e.g., range of chromosome numbers and ploidy levels, occurrence of endopolyploidy, GC content, chromosome packaging and organization, genome size) between monocots and the remaining angiosperms to discern just how distinctive monocot genomes are. One of the most notable features of monocots is their wide range and diversity of genome sizes, including the species with the largest genome so far reported in plants. This genomic character is analysed in greater detail, within a phylogenetic context. By surveying available genome size and chromosome data it is apparent that different monocot orders follow distinctive modes of genome size and chromosome evolution. Further insights into genome size-evolution and dynamics were obtained using statistical modelling approaches to reconstruct the ancestral genome size at key nodes across the monocot phylogenetic tree. Such approaches reveal that while the ancestral genome size of all monocots was small (1C = 1.9 pg), there have been several major increases and decreases during monocot evolution. In addition, notable increases in the rates of genome size-evolution were found in Asparagales and Poales compared with other monocot lineages.

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Section: 7mentioning

confidence: 64%

Genome Size Dynamics and Evolution in Monocots

et al. 2010

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“…He also gives the following lowland examples: Pomaderris (Rhamnaceae) (Allan 1961). Astelia (Liliaceae) (Wheeler 1966). Gaultheria and Pernettya (Ericaceae) (Armstrong 1964).…”

Section: Inflorescence Developmentmentioning

confidence: 99%

Flower biology in New Zealand

Godley¹

1979

New Zealand Journal of Botany

151

125

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Research on flower biology began in New Zealand in the early 18705 under the influence of Darwin' s work on orchids. but from the tum of the century there was a decline in interest until the 1950s. Spring and summer are the main flowering periods. but many species flower in winter and examples are described. Of some 1800 indigenous species of flowering plants 12-13% are dioecious. c. 2% gynodioecious. and 9% monoeciou5. But in many cases the unisexuality is characteristic of a widespread family or genus and cannot be claimed as having evolved in New Zealand. The morphological differentiation between male and female flowers settles down at a level characteristic of the genus and the degree of differentiation need not reflect the time since differentiation began. In hermaphrodite species heterostyly is not known. and demonstrated examples of self-sterility are few. A classification of 649 species with attractive flowers gives 60.6% white. 17.2% yellow. 12.4% blue lilac or dark purple. 5.7% red to crimson. and 4% green. A large sample from the British Isles has 25.1% white flowers. It is emphasised the flowers classified as white are rarely completely so. that a white plus yellow group is important. and that not all the flower colours need have evolved under New Zealand conditions. Nectar and honey-dew from native plants provide useful honey sources. but work on nectar has been confined to cases of bee poisoning. Available pollinators are birds (7 spp.), bats (I sp.). butterflies (16 spp.), and solitary bees (c. 40 spp.) as well as many species of moths. beetles. and flies and several introduced bees. The general impression is of widespread self-fertility in hermaphrodite plants and variety in respect of insect visitors. It is emphasised that although much attention, everywhere, has been given to methods of pollination, more attention should be given to the results. i.e., the percentage of ovules which produce seeds. And it is also emphasised that a better understanding of the characteristics of New Zealand flowers wiIl be obtained by studying their relatives in other lands. 441 INTRODUCTIONFloras of New Zealand, including the current volumes (Allan 1961. Moore & Edgar 1970 have always included useful information on flowers, their gender, colour. and flowering times. But the first paper on flower biology appeared soon after the subject entered its modem phase in the Northern Hemisphere. In IS73 Cheeseman described the pollination mechanism of an orchid. Pterostylis trulli/olia. This began 30 years of observations on native plants. a period reviewed in two important papers by Thomson (IS81a, 1927). Then. from the tum of the century, interest in flower biology waned, and except for the work of Heine (1938) other branches of ecology were favoured. But from the I 950s onwards interest revived, and some aspects of recent work were reviewed by Hair (1966).

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“…Astelia and Collospermum have superior ovaries that are uni- or trilocular and trilocular, respectively. Published chromosome numbers for Astelia taxa range from 2 n = 60 to 2 n = 210 (Wheeler 1966, Dawson and Beuzenberg 2000, de Lange et al 2004). Darlington and Wylie (1955) proposed a basic chromosome number for Astelia of x = 8, but Wheeler (1966) considered the basic chromosome number to be x = 5, 7, or 35.…”

Section: Introductionmentioning

confidence: 99%

A revision of infrageneric classification in Astelia Banks & Sol. ex R.Br. (Asteliaceae)

Birch

2015

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Systematic investigations and phylogenetic analyses have indicated that Astelia, as currently circumscribed, is paraphyletic, with Collospermum nested within it. Further, Astelia subgenus Astelia is polyphyletic, and Astelia subgenera Asteliopsis and Tricella are paraphyletic, as currently circumscribed. Revision of the subgeneric classification of Astelia is warranted to ensure classification accurately reflects the evolutionary history of these taxa. Collospermum is relegated to synonymy within Astelia. Astelia is dioecious or polygamodioecious, with a superior ovary, anthers dorsi- or basifixed, pistillodes or pistils that have a single short or poorly defined style, a 3 lobed stigma, and fleshy uni- or trilocular fruit with funicular hairs that are poorly to well developed. Astelia subgenus Collospermum (Skottsb.) Birch is described. A key to Astelia sections is provided. Astelia hastata Colenso, Astelia montana Seem., and Astelia microsperma Colenso pro parte are resurrected and the new combination Astelia samoense (Skottsb.) Birch, comb. nov. is made.

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Cytotaxonomy of the large Asteliads (Liliaceae) of the North Island of New Zealand

Cited by 16 publications

References 3 publications

Genome Size Dynamics and Evolution in Monocots

Genome Size Dynamics and Evolution in Monocots

Flower biology in New Zealand

A revision of infrageneric classification in Astelia Banks & Sol. ex R.Br. (Asteliaceae)

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Cytotaxonomy of the large Asteliads (Liliaceae) of the North Island of New Zealand

Cited by 16 publications

References 3 publications

Genome Size Dynamics and Evolution in Monocots

Genome Size Dynamics and Evolution in Monocots

Flower biology in New Zealand

A revision of infrageneric classification in Astelia Banks &amp; Sol. ex R.Br. (Asteliaceae)

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Product

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A revision of infrageneric classification in Astelia Banks & Sol. ex R.Br. (Asteliaceae)