| 1. |
- Hooijmaijers, Cornelis, et al.
(författare)
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Photoprotective pigments in red and green gametophytesof two New Zealand liverworts
- 2007
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Ingår i: New Zealand Journal of Botany. - : The Royal Society of New Zealand. - 0028-825X .- 1175-8643. ; 45, s. 451-461
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Tidskriftsartikel (refereegranskat)abstract
- Gametophytes of Jamesoniella colorata (Jungermanniaceae) and Isotachis lyallii (Isotachidaceae) produce red leaves in exposed habitats, but green leaves in shaded environments. To understand the functional significance of this colour polymorphism, the anatomy, pigment composition, optical properties, and kinetics of chlorophyll a fluorescence were compared for red and green gametophytes. Both colour morphs were structurally similar, but the red leaves held unidentified red pigment(s) firmly associated with the cell wall. Green morphs contained more chlorophylls and carotenoids, and had higher ratios of chlorophylls to carotenoids, than did the red morphs. Red leaves absorbed 10% more photosynthetically active radiation, with a maximum at 540 nm, than did the green leaves. Under high irradiance, the red leaves maintained higher apparent quantum efficiencies for photosynthesis, and had larger photochemical and non-photochemical quenching values. The data indicate that red gametophytes have the greater potential to mitigate the damaging effects of high irradiance.
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| 2. |
- Paulus, B., et al.
(författare)
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Phylogenetic studies in Hypochnicium (Basidiomycota), with special emphasis on species from New Zealand
- 2007
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Ingår i: New Zealand Journal of Botany. - 0028-825X. ; 45:1, s. 139-150
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Tidskriftsartikel (refereegranskat)abstract
- The taxonomic and phylogenetic affiliation of Hypochnicium specimens from New Zealand were studied using morphological and molecular analyses. Phylogenetic analyses based on ITS region of rDNA suggest that species within Hypochnicium form a monophyletic group with respect to outgroups. The synonymy of Gyrophanopsis with Hypochnicium is validated and the genus Nodotia is re-evaluated as a synonym of Hypochnicium. Sequence analyses of H. zealandicum and a specimen within the H. punctulatum complex from New Zealand place both as sister taxa of H. polonense and H. cremicolor, respectively. Although spore dimensions of H. zealandicum overlap with those of H. polonense, it is currently retained as a separate species on the basis of geographical separation and phylogenetic analysis. New Zealand specimens recorded as H. punctulatum represent a new species, which is described and illustrated as H. aotearoae.
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| 3. |
- Rapson, G.L., et al.
(författare)
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Subalpine gully-head ribbon fens of the Lammerlaw and Lammermoor Ranges, Otago, New Zealand
- 2006
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Ingår i: New Zealand Journal of Botany. - 0028-825X. ; 44, s. 351-375
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Tidskriftsartikel (refereegranskat)abstract
- Vegetation patterns of subalpine gully-head mires were investigated in the flat-topped Lammerlaw and Lammermoor Ranges, South Island, New Zealand. Two intensively studied mires each consist of a series of peaty terraces and scarps. Terraces may contain pools, elongated downslope in the narrow, lower altitude mire, but across slope in the broader, upper mire. A crest occurs on some terrace lips, and marginal "spillways" (channel-like zones) occur down some scarps. Some mires have drained by subsurface pipes. Vegetation analysis distinguished between grassland or herbfield on gully sides, vegetation of mire margins, showing aspect differences on the steeper, lower mire, and the vegetation of gully floors, including oligotrophic mire centre vegetation and species-poor pools. The crests, though warmer, bore no special vegetation type. Mineral soil beneath the peat indicates a previous non-mire vegetation, which has subsequently paludified. Scarp slumps indicate downslope creep of organic material. Peat fissures, and mineral, vegetation, and erosion dams all appear to have initiated development of some pools. Mires are designated gully-head ribbon fens. Patterning appears to be accentuated because of the mires' gully-head location on broad-topped ranges, and drainage of soligenous water from upslope gully sides. These apparently unique fens give insight into patterning in aapa mires, and merit special conservation.
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| 4. |
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| 6. |
- Stirbet, Alexandrina, et al.
(författare)
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Celebrating the contributions of Govindjee after his retirement : 1999-2020
- 2020
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Ingår i: New Zealand Journal of Botany. - : Taylor & Francis. - 0028-825X .- 1175-8643. ; 58:4, s. 422-460
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Forskningsöversikt (refereegranskat)abstract
- Govindjee, Professor Emeritus of Biochemistry, Biophysics and Plant Biology at the University of Illinois at Urbana-Champaign since 1999, is renowned for his pioneering work in the light reactions of photosynthesis and important accomplishments as educator, editor, historian and advocate of photosynthesis. In his honour, we review his contributions over the last twenty years, which were often achieved in collaboration with scientists working in laboratories around the world. We start with a short presentation about Govindjee’s career and continue with a section highlighting his passion and dedication to teach the younger generations of students and researchers about photosynthesis. His research work is grouped under different areas, including primary photochemistry; the relationship of chlorophyll a fluorescence to photosynthesis; short time-scale regulation processes of photosynthesis; studies toward improving photosynthesis and biomass yields; and, mathematical modelling of photosynthesis and artificial photosynthesis. He is best known for the discovery of the key role of bicarbonate on the electron acceptor side of Photosystem II. We also present his active involvement in the recognition of scientists at conferences and beyond, as well as of those who are no longer with us. He is committed to keeping alive the pioneers and discoverers in the field of photosynthesis in the collective memory of those in the field.
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| 7. |
- Swenson, U
(författare)
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Abrotanella rostrata (Asteraceae, Senecioneae) - A new species for New Zealand
- 1996
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Ingår i: NEW ZEALAND JOURNAL OF BOTANY. - : SIR PUBLISHING. - 0028-825X. ; 34:1, s. 47-50
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Abrotanella rostrata Swenson, a new species of the Asteraceae (Senecioneae), confined to southern South Island, New Zealand, is described. It is closely related to and has hitherto been identified with the Auckland and Campbell Islands endemic species A.
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| 8. |
- Williams, Alwyn, et al.
(författare)
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Different arbuscular mycorrhizal inoculants affect the growth and survival of Podocarpus cunninghamii restoration plantings in the Mackenzie Basin, New Zealand
- 2012
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Ingår i: New Zealand Journal of Botany. - 0028-825X. ; 50:4, s. 473-479
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Tidskriftsartikel (refereegranskat)abstract
- There is increasing interest in the use of arbuscular mycorrhizal fungi (AMF) for ecological restoration, as AMF can improve plant nutrition and growth. However, some AMF can have negative effects on plant growth. It is therefore critical that restoration strategies incorporate appropriate AMF. This research investigated differences in growth and survival of Podocarpus cunninghamii (mountain tōtara) cuttings with six different AMF inoculums, with the aim of choosing the most appropriate mycorrhizal species for restoration success. Cuttings of P. cunninghamii were inoculated with AMF ranging from indigenous to exotic, including commercially available AMF and AMF isolated from remnant P. cunninghamii forest and ex-agricultural grassland. Plant growth and survival was compared after two seasons at a high country restoration site in the Mackenzie Basin. Plants treated with forest and indigenous AMF had significantly greater survival than those treated with commercial AMF. Forest AMF also resulted in significantly greater P. cunninghamii growth than all the other treatments. This has potentially important implications for restoration, as improved growth and survival of native woody species can improve restoration success by increasing establishment success and reducing management costs.
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