Photochemical quenching, nonphotochemical quenching, and yield of photosystem II were measured on seedlings of full-sibling, open-, and self-pollinated slash pine (Pinus elliottii Engelm. var. elliottii) families. Our results reveal that genetic variation in photochemical quenching and yield of photosystem II exists within this species. The pattern of variation found in these traits is consiste...

Two procedures that guarantee the property of additivity among the components of tree biomass and total tree biomass utilizing nonlinear functions are developed. Procedure 1 is a simple combination approach, and procedure ‘2. is based on nonlinear joint-generalized regression (nonlinear seemingly unrelated regressions) with parameter restrictions. Statistical theory is given for construction of...

This study aims to propose a novel method, vacuum infusion process, measure the longitudinal permeability of wood. The method uses bag sealed over fibrous material, with inlet and outlet. It can be performed on top any flat surface, its process is relatively swift. Six different woods (Pinus elliottii, Araucaria angustifolia, Ochroma pyramidale, Cedrela fissilis, Tectona grandis, Eucalyptus gra...

A system of nonlinear biomass component equations was developed for slash pine (Pinus elliottii Engelm. var. elliottii) trees using an econometric approach in which endogenous right-hand-side variables were included some equations. The fitted to data from 306 sampled the southeastern United States with weighted two-stage (2SLS) and three-stage (3SLS) least squares full information maximum-likel...

This study proposes the use of genetic analysis as a complementary method for species identification in genus Pinus, particularly cases where anatomical is challenging. Pinus were grouped based on similarities, and efficacy using ycf1b, which most variable identification, rbcL, suggested DNA barcode land plants, was evaluated within each group. Sequences obtained from National Center Biotechnol...