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| Hernández,LF. |
| The relationships between (1) leaf biomass and morphology (lamina area and petiole and lamina inclination), (2) petiole's mechanical and structural properties, and (3) the vertical light gradient inside the crop's canopy were studied in field grown sunflower (Helianthus annuus L.) plants, maintained at optimum soil water and mineral levels. At flowering, incident photosynthetic active radiation (PAR) was measured at the top of the canopy and on individual leaves using a quantum sensor. The fraction of direct incident radiation which passed through the canopy reaching each individual leaf was then calculated. Individual petiole and lamina inclination angles (iaPetiole and iaLamina, respectively) were measured from sequential digital images. These were taken... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomechanics; Helianthus; Leaf angle; Light interception; Sunflower. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200001 |
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| Freire,Susana E.; Bayón,Néstor D.; Giuliano,Daniel A.; Ariza Espinar,Luis; Sáenz,Alcides A.; Monti,Claudia; Delucchi,Gustavo. |
| Se mencionan los siguientes nuevos registros de Asteráceas para la provincia de Catamarca, Argentina: Baccharis acaulis, B. boliviensis var. latifolia, B. flexuosa, B. glutinosa var. angustissima, B. stenophylla (Tribu Astereae), Eupatorium patens var. tomentosum (Tribu Eupatorieae), Cosmos bipinnatus, C. peucedanifolius var. peucedanifolius, Helianthus annuus (Tribu Heliantheae), Gamochaeta erythractis, G. longipedicellata, Gnaphalium lacteum, Tessaria integrifolia var. integrifolia (Tribu Inuleae), Chuquiraga ruscifolia (Tribu Mutisieae), Senecio crepidifolius, S. subulatus var. subulatus, Xenophyllum incisum var. incisum (Tribu Senecioneae). Se citan además el hábitat de los taxones y las provincias fitogeográficas que integran. Se propone una nueva... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Catamarca; Asteraceae; Baccharis; Chuquiraga; Cosmos; Gamochaeta; Gnaphalium; Helianthus; Eupatorium; Senecio; Tessaria; Xenophyllum. |
| Ano: 2011 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722011000100014 |
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