You need JavaScript to view this

Photosynthetic pathways and the geographical distribution of grasses in South West Africa/Namibia

Journal Article:

Abstract

Analysis of floristic lists for South West Africa/Namibia shows that, throughout the territory, more than 95% of the grass species occurring in any given area display the C/sub 4/ photosynthetic pathway. Exceptions are areas in the north-east and southwest where between 5% and 18% of the grass species are of the C/sub 3/ type. The south-western district of Luderitz falls within the winter rainfall area and it is only here that temperate C/sub 3/ genera are found. The C/sub 3/ species in the north-east belong to tropical groups. Most of the South West African C/sub 3/ grasses grow in specialized habitats and are either hydrophytes or sciophytes. Subdivision of the C/sub 4/ grasses into the three subtypes of the C/sub 4/ pathway reveals distinctive distributional trends. Malate formers or NADP-me species clearly become more abundant with increasing rainfall, whereas the aspartate formers show the opposite tendency. However, within the aspartate forming group the results show that it is specifically the NAD-me type of species which dominate in areas of very low precipitation, notably in the Namib and pre-Namib areas where rainfall is less than 200 mm/yr. The PEP-ck species form a group intermediate between the malate formers and the NAD-me  More>>
Authors:
Ellis, R P; [1]  Vogel, J C; Fuls, A [2] 
  1. Department of Agriculture and Fisheries, Pretoria (South Africa). Botanical Research Institute
  2. Council for Scientific and Industrial Research, Pretoria (South Africa). National Physical Research Lab.
Publication Date:
Jul 01, 1980
Product Type:
Journal Article
Reference Number:
AIX-11-562134; EDB-81-006277
Resource Relation:
Journal Name: S. Afr. J. Sci.; (South Africa); Journal Volume: 76:7
Subject:
59 BASIC BIOLOGICAL SCIENCES; GRAMINEAE; BIOLOGICAL PATHWAYS; PHOTOSYNTHESIS; BIOLOGICAL MODELS; CARBON 12; CARBON 13; GEOGRAPHICAL VARIATIONS; ISOTOPE RATIO; SOUTH WEST AFRICA; AFRICA; CARBON ISOTOPES; CHEMICAL REACTIONS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; ISOTOPES; LIGHT NUCLEI; NUCLEI; PHOTOCHEMICAL REACTIONS; PLANTS; SOUTH AFRICA; STABLE ISOTOPES; SYNTHESIS; VARIATIONS; 550501* - Metabolism- Tracer Techniques
OSTI ID:
6819775
Country of Origin:
South Africa
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: SAJSA
Submitting Site:
INIS
Size:
Pages: 307-314
Announcement Date:

Journal Article:

Citation Formats

Ellis, R P, Vogel, J C, and Fuls, A. Photosynthetic pathways and the geographical distribution of grasses in South West Africa/Namibia. South Africa: N. p., 1980. Web.
Ellis, R P, Vogel, J C, & Fuls, A. Photosynthetic pathways and the geographical distribution of grasses in South West Africa/Namibia. South Africa.
Ellis, R P, Vogel, J C, and Fuls, A. 1980. "Photosynthetic pathways and the geographical distribution of grasses in South West Africa/Namibia." South Africa.
@misc{etde_6819775,
title = {Photosynthetic pathways and the geographical distribution of grasses in South West Africa/Namibia}
author = {Ellis, R P, Vogel, J C, and Fuls, A}
abstractNote = {Analysis of floristic lists for South West Africa/Namibia shows that, throughout the territory, more than 95% of the grass species occurring in any given area display the C/sub 4/ photosynthetic pathway. Exceptions are areas in the north-east and southwest where between 5% and 18% of the grass species are of the C/sub 3/ type. The south-western district of Luderitz falls within the winter rainfall area and it is only here that temperate C/sub 3/ genera are found. The C/sub 3/ species in the north-east belong to tropical groups. Most of the South West African C/sub 3/ grasses grow in specialized habitats and are either hydrophytes or sciophytes. Subdivision of the C/sub 4/ grasses into the three subtypes of the C/sub 4/ pathway reveals distinctive distributional trends. Malate formers or NADP-me species clearly become more abundant with increasing rainfall, whereas the aspartate formers show the opposite tendency. However, within the aspartate forming group the results show that it is specifically the NAD-me type of species which dominate in areas of very low precipitation, notably in the Namib and pre-Namib areas where rainfall is less than 200 mm/yr. The PEP-ck species form a group intermediate between the malate formers and the NAD-me grasses, especially as far as their water requirements are concerned.}
journal = {S. Afr. J. Sci.; (South Africa)}
volume = {76:7}
journal type = {AC}
place = {South Africa}
year = {1980}
month = {Jul}
}