✦ LIBER ✦

Effects of sucrose on photosynthesis and phosphoenolpyruvate carboxylase activity of in vitro cultured strawberry plantlets

✍ Scribed by Chafik Hdider; Yves Desjardins

Publisher: Springer
Year: 1994
Tongue: English
Weight: 519 KB
Volume: 36
Category: Article
ISSN: 0167-6857
DOI: 10.1007/bf00048312

No coin nor oath required. For personal study only.

✦ Synopsis

Photosynthesis and phosphoenolpyruvate carboxylase activity were investigated in 5, 10 and 28 day-old micropropagated strawberry plantlets (Fragaria x ananassa Duch. cv Kent) rooted in vitro with different levels of sucrose (0, 1, 3 and 5%) on cellulose plugs (Sorbarods). The photosynthetic capability was influenced by the level of sucrose in the culture medium with the largest rates of photosynthesis corresponding to the cultures with 0 and 1% sucrose. The apparent quantum yield and the ratio of variable fluorescence to maximum fluorescence were also reduced in plantlets cultured with 3 or 5% sucrose as compared to those with 0 or 1%. Phosphoenolpyruvate carboxylase activity was largest 5 and 10 days after the onset of culture and decreased in the absence of sucrose in the culture medium. At 28 days after the onset of culture, the activity of this carboxylating enzyme was lower than at the beginning of culture and independent of the concentration of sucrose in the culture medium. Phosphoenolpyruvate carboxylase appears to be an important carboxylating enzyme in micropropagated plantlets.

📜 SIMILAR VOLUMES

Effects of abscisic acid on photosynthes

Effects of abscisic acid on photosynthesis in whole leaves: changes in CO2assimilation, levels of carbon-reduction-cycle intermediates, and activity of ribulose-1,5-bisphosphate carboxylase

✍ E. Fischer; K. Raschke; M. Stitt 📂 Article 📅 1986 🏛 Springer-Verlag 🌐 English ⚖ 938 KB

Addition of abscisic acid (ABA) to the transpiration stream of leaves of Xanthium strumarium caused stomatal closure and, simultaneously, an independent reduction of CO2 assimilation. An attempt was made to identify the site of inhibition that had occurred, presumably, in the path of photosynthetic

Electrospun cross-linked gelatin fibers

Electrospun cross-linked gelatin fibers with controlled diameter: The effect of matrix stiffness on proliferative and biosynthetic activity of chondrocytes cultured in vitro

✍ Maciej Skotak; Sandra Noriega; Gustavo Larsen; Anuradha Subramanian 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 762 KB

## Abstract Nanofibrous scaffolds were prepared from gelatin solutions and were further cross‐linked with glutaraldehyde (GA). The fiber diameter was varied from 100 to 1000 nm by controlling the applied voltage (4–15 kV) and the concentration of the gelatin solution (4–15%). The tensile moduli and

Effect of adding an anaerobic fungal cul

Effect of adding an anaerobic fungal culture isolated from a wild blue bull (Boselophus tragocamelus) to rumen fluid from buffaloes on in vitro fibrolytic enzyme activity, fermentation and degradation of tannins and tannin-containing Kachnar tree (Bauhinia variegata) leaves and wheat straw

✍ Shyam S Paul; Devki N Kamra; Vadali RB Sastry; Narottam P Sahu 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 178 KB 👁 1 views

## Abstract The study investigated the effects of adding an anaerobic fungus (__Piromyces__ sp FNG5; isolated from the faeces of a wild blue bull) to the rumen fluid of buffaloes consuming a basal diet of wheat straw and concentrates on __in vitro__ enzyme activities, fermentation and degradation o