title: Photoacoustic spectroscopy study of Blepharocalyx salicifolius (Kunt) O. Berg.
abstract: Photoacoustic spectroscopy (PAS) has revolutionized the fields of biological, environmental, and agricultural sciences. It is a very simple, sensitive, and non-destructive technique that allows the determination of optical properties of bio-samples. The in vivo chlorophylls of the leaf have a recorded maximum absorption peak at 675 nm as against 665 nm of the in vitro chlorophylls. The intensity of purple pigmentation in leaves of Blepharocalyx salicifolius (Kunt) O. Berg, is inversely correlated to the soil moisture levels, leaf water content and leaf water potentials. The applicability of PAS to biological samples was discussed. It allows the validation of existing emission models which are important for atmospheric process. A portable device for photoacoustic spectroscopy of plants and other photosynthetic tissues, cells and organelles is provided. Further, there is provided a method to measure photosynthesis of such tissues, cells and organelles.
authors.affiliation: Universidade Federal do Acre, Centro de Ciências Biológicas e da Natureza, Rio Branco AC 69915-900, Brazil. ruiz@ufac.br
authors.forename: A F R
authors.initials: AF
authors.lastname: Rodriguez
authors.forename: T K B
authors.initials: TK
authors.lastname: Jacobson
authors.forename: J S F
authors.initials: JS
authors.lastname: Moraes
authors.forename: F S E D V
authors.initials: FS
authors.lastname: Faria
authors.forename: R M
authors.initials: RM
authors.lastname: Cunha
authors.forename: J G
authors.initials: JG
authors.lastname: Santos
authors.forename: A C
authors.initials: AC
authors.lastname: Oliveira
authors.forename: R B
authors.initials: RB
authors.lastname: Azevedo
authors.forename: M A
authors.initials: MA
authors.lastname: Morales
authors.forename: P C
authors.initials: PC
authors.lastname: Morais
mesh_terms: D000042:Absorption; D027822:Myrtaceae / Q000737:chemistry*; D061088:Photoacoustic Techniques / Q000379:methods*; D018515:Plant Leaves / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013696:Temperature