Natural abundance of 13C in tropical grasses from the INPA, Instituto Nacional de Pesquisas da Amazônia, herbarium
The stable carbon isotopic composition of 165 grass species was determined with the objective of verifying their photosynthetic pathway (C3 and C4). The samples, taken from the INPA herbarium, were mainly collected in the North of Brazil. Approximately 60% of the species proved to be of the C4 type, with <FONT FACE="Symbol">d</font> 13C values ranging from -13.6 to -9.5, while the remainder 40% belonged to the C3 type, with values ranging from -34.7 to -23.4. This relatively high proportion of C3 species is probably due to the high relative humidity of the sites where the species were collected.
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| Main Authors: | , , , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Sociedade Botânica de São Paulo
1999
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| Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041999000100007 |
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| Summary: | The stable carbon isotopic composition of 165 grass species was determined with the objective of verifying their photosynthetic pathway (C3 and C4). The samples, taken from the INPA herbarium, were mainly collected in the North of Brazil. Approximately 60% of the species proved to be of the C4 type, with <FONT FACE="Symbol">d</font> 13C values ranging from -13.6 to -9.5, while the remainder 40% belonged to the C3 type, with values ranging from -34.7 to -23.4. This relatively high proportion of C3 species is probably due to the high relative humidity of the sites where the species were collected. |
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