Photosynthetic Acclimation and Growth Responses to Elevated CO2 Associate with Leaf Nitrogen and Phosphorus Concentrations in Mulberry (Morus multicaulis Perr.)

Photosynthetic responses of Scots pine to elevated CO2 and nit

trees, age 25--30 years, were subjected to two soil-nitrogensupply regimes and to elevated atmospheric CO2 concentrations by the branch-in-bag method from April 15 to September 15 for two or three years. Gas exchange in detached shoots was measured in a diffuse radiation field. Seven parameters associated with photosynthetic performance and two describing stomatal conductance were determined to...

Predicting Ecosystem Responses to Elevated CO2 Concentrations

O ne of the many changes occurring in the biosphere due . to human activities is the increase in the carbon dioxide concentration of the atmosphere. This change is due both to the burning of fossil fuels, which is ejecting approximately 5-6 gT of carbon into the atmosphere yearly, and to deforestation, which may account for another 1~2 gT (Moore and Bolin 1986/87, Detwiler and Hall 1988). The p...

The Latex Protein MLX56 from Mulberry (Morus multicaulis) Protects Plants against Insect Pests and Pathogens

Biotic stresses are major constraints limiting the leaf quality and productivity of mulberry. MLX56 is a unique chitin-binding protein isolated from Shin-Ichinose (Morus alba) latex that displays toxicity against lepidopteran caterpillars. In this study, the full-length cDNA encoding MLX56 was isolated from Husang 32 (M. multicaulis) and designated HMLX56. Amino acid sequence analysis and prote...

Photosynthetic acclimation to elevated CO2 in relation to Rubisco gene expression in three C3 species.

Wheat (Triticum aestivum L. var. DL 1266-5), sunflower (Helianthus annuus L. var. MSFH 17) and mungbean [Vigna radiata (L.) Wilczek var. P 9072] were grown in field under atmospheric (360 +/- 10 cm3 m(-3), AC) and elevated (650 +/- 50 cm3 m(-3), EC) CO2 concentrations in open top chambers for entire period of growth and development. Photosynthetic acclimation to elevated CO2 was examined by com...

Relationships Between Needle Nitrogen Concentration and Photosynthetic Responses of Douglas-Fir Seedlings to Elevated CO2 and Temperature