Plant growth rates and seed size: a re-evaluation.
Ecology
; 93(6): 1283-9, 2012 Jun.
Article
em En
| MEDLINE
| ID: mdl-22834369
ABSTRACT
Small-seeded plant species are often reported to have high relative growth rate or RGR. However, because RGR declines as plants grow larger, small-seeded species could achieve higher RGR simply by virtue of their small size. In contrast, size-standardized growth rate or SGR factors out these size effects. Differences in SGR can thus only be due to differences in morphology, allocation, or physiology. We used nonlinear regression to calculate SGR for comparison with RGR for 10 groups of species spanning a wide range of life forms. We found that RGR was negatively correlated with seed mass in nearly all groups, but the relationship between SGR and seed mass was highly variable. We conclude that small-seeded species only sometimes possess additional adaptations for rapid growth over and above their general size advantage.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Plantas
/
Sementes
/
Desenvolvimento Vegetal
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Ecology
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Suíça