H. E. Connor

University of Canterbury

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

E. Edgar

Age UK

Andrew W. Purdie

University of Auckland

B. P. J. Molloy

University of Cambridge

Ana M. Antón

Victor Babeș University of Medicine and Pharmacy Timișoara

Surrey W. L. Jacobs

Royal Botanic Garden Sydney

Murray I. Dawson

Manaaki Whenua – Landcare Research

R. W. Bailey

University of Birmingham

Joy Everett

Royal Botanic Garden Sydney

Marta E. Astegiano

Universidad Nacional de Córdoba

K. F. O'Connor

Lincoln University

Cooperative Institutions

Lincoln University

Manaaki Whenua – Landcare Research

Cadre Research

University of Otago

Australian National University

University of Canterbury

Massey University

Sichuan Agricultural University

Universidad Nacional de Córdoba

AgResearch

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Inheritance of triterpene methyl ethers in Cortaderia (Gramineae)

Phytochemistry (1976)

H. E. Connor Andrew W. Purdie

Selfing

Interspecific hybrids

Mendelian inheritance

10.1016/s0031-9422(00)88850-0

Cite

Citations (17)

Chemical composition of new zealand tall-tussocks (chionochloa)

New Zealand Journal of Agricultural Research (1970)

H. E. Connor R. W. Bailey K. F. O'Connor

Abstract Minerals, nitrogen, structural carbohydrates, and lignin analyses from field collections of four species of high country tall-tussocks, species of Chionochloa, are reported. Differences among species were found for cellulose and hemicellulose, and values for these were higher than is common in pasture grasses. In C. macra and C. rubra cellulose: hemicellulose ratios were equal to 1.0, a condition not common to herbaceous plants. C. rubra was highest in estimated lignin. Substantial intraspecific ranges for N, P, K, Ca, and Mg occurred. Nitrogen rarely exceeded \% and was lowest in C. rubra. There were significant interspecific differences for P, K, Ca, and Mg; P was higher in C. macra and C. rigida than in C. flavescens and C. rubra; K and Mg were lower in C. rubra than in other species; for Ca there was a clear differentiation C. flavescens>C. rigida~> C. macra> C. rubra. In the field survey C. macra was significantly higher in total ash than other species. Silicon reached almost 2% in a field sample of C. macra, a value twice that of other species, but was not conspicuously higher in garden conditions. C. rubra contained less Al than other species both in the field and in the uniform environment gardens. Variation in the frequency with which tall-tussocks are grazed by stock may be related to differences in mineral composition within species. Differences between species in acceptability to stock appear to be related to differences in mineral and lignin composition.

Tussock

Festuca rubra

Herbaceous plant

10.1080/00288233.1970.10421602

Cite

Citations (35)

Interspecific variation in epicuticular waxes of Chionochloa

Phytochemistry (1988)

Marion Savill Roy Bickestaffe H. E. Connor

Epicuticular wax

Wax ester

Alkane

Chemotaxonomy

Carbon chain

10.1016/0031-9422(88)80756-8

Cite

Citations (3)

Patterns inChionochloaGrasslands

New Zealand Journal of Botany (1982)

Peter A. Williams H. E. Connor B. P. J. Molloy P. Bannister Graeme Ward

Bannister & Ward (1981) recently examined the changes in non-structural carbohydrate contents of Chionochloa rigida and macra during winter . We agree that their observations help to provide a physiological explanation for the success of rigida at lower and the restriction of macra to higher altitudes (p. 239). However, we cannot agree that their observations in any way support the interpretation that mixed stands of macra and rigida result from e. rigida extending its range upslope in response to a 'post-Little Ice Age' Warming (Meurk 1978, p. 47). For Canterbury mountains Connor (1965) showed that irrespective of aspect, at lower in the Rakaia catchment, macra (then known for that area as rigida) dominated on fine-textured soils, whereas C. flavescens (eastern South Island form) dominated on coarse-textured rubbly soils. Nearby in the Ashburton catchment, a similar relationship was found between C. macra (by then known as Ozionochloa Q) and rigida Connor & MacRae 1969). For Central Otago mountains, where land surfaces are more stable and altitudinal zonation is strong, macra was not recognised as a distinct taxon but merely as a high altitude ecotype of rigida influenced by climatic gradients (Mark 1965). Numerous experiments and plant tissue analyses have since shown that macra has very distinctive nutrient requirements and a mineral ecology that has adapted it to grow on older soils than those of rigida or flavescens (eastern South Island form) (Connor et a1. 1970, Molloy & O'Connor 1970, O'Connor et al. 1972, Williams et a1. 1978). These observations and experiments provided an explanation for the patterns described by Connor (1965) and Connor & MacRae (1969). They also enable us to suggest that land surfaces with pure macra, or rigida with macra, will have some underlying soil differences compared with pure stands of rigida on the same slope and with the same climate - a process of logic first described by Jenny (1941). It was such a situation in the Ashburton catchment that Williams et al. (1977) referred to. Here there are no major differences in parent rock, but the soils beneath the mixed stands are finer textured than those beneath pure rigida. We interpret these patterns as resulting from the influence of the state factors-parent material and time--on the whole ecosystem, in the sense of Jenny (1958, 1980), without having to introduce the more complex and tenuous notion of climatic change. We have abundant unpublished evidence to further support our argument, but have based this reply solely with reference to published field examples and experimental or analytical data.

10.1080/0028825x.1982.10428514

Cite

Citations (1)

Flowers and floral biology of the holy grasses (Hierochloe and Anthoxanthum: Aveneae, Gramineae)

Flora (2012)

H. E. Connor

10.1016/j.flora.2012.01.010

Cite

Citations (10)

Tussock grassland communities in the Mackenzie Country, South Canterbury, New Zealand

New Zealand Journal of Botany (1964)

H. E. Connor C. G. Vucetich

Summary There are three major tussock grassland communities in the Mackenzie Country: (i) fescue-tussock grassland where Festuca novae-zeladiae is abundant, (ii) red- tussock grassland where Chionochloa rubra is the physiognomic dominant, and (iii) snow-tussock grassland where Chionochloa rigida is the physiognomic dominant. Socioligical analyses of these communities in which severa phases are recognised are given in tables. The history of the grasslands is traced from the destruction of the forests through tall-tussock stages to the current extensive short-tussock grassland of recent origin.

Tussock

Festuca

10.1080/0028825x.1964.10428730

Cite

Citations (76)

Genetic pistillody in New Zealand wheat.

Wheat information service (1970)

H. E. Connor Andrew W. Purdie

Source

Cite

Citations (2)

The Poisonous Plants in New Zealand