Photosynthetic and biochemical characterization of in vitro-derived African violet (Saintpaulia ionanthaH. Wendl) plants to ex vitro conditions

Photosynthetic activity of red and green leaf sectors in Coleus blumei plants as sensed by chlorophyll fluorescence

“…Electrons transferred from PSII to PSI are used by downstream electron sink pathways, including photosynthetic carbon fixation and photorespiration. When carbon fixation becomes saturated, photosynthesis is unable to use all of the energy absorbed by plants under high light (Dewir et al 2015). Plants adapt photosynthesis to a certain degree in response to the prevailing environment, and the sensitivity of photosynthesis to stress varies among plant species and cultivars.…”

Effect of photosynthetic photon flux density on growth, photosynthetic competence and antioxidant enzymes activity during ex vitro acclimatization of Dieffenbachia cultivars

“…DHN proteins were detected according to Rihan et al (2014) with modifications described by Dewir et al (2015). Total proteins from the fully expanded young leaves were extracted as described previously by Ni et al (1996).…”

“…Our results showed the accumulation of various DHN during light induced stress during ex vitro acclimatization and indicate that DHN proteins may be involved in safeguarding cell membranes during light induced stress. Recently, Dewir et al (2015) reported on accumulation of DHN in relation to a light-induced stress at both low and high PPFD (35 and 100 lmol m -2 s -1 ) during ex vitro acclimatization of African violet plants. The results of the present study are in accordance with the work of Hara et al (2003) and Dewir et al (2015) who have demonstrated the role of DHN in inhibition of lipid peroxidation in transgenic tobacco and acclimatizing African violet plants, respectively.…”

“…Recently, Dewir et al (2015) reported on accumulation of DHN in relation to a light-induced stress at both low and high PPFD (35 and 100 lmol m -2 s -1 ) during ex vitro acclimatization of African violet plants. The results of the present study are in accordance with the work of Hara et al (2003) and Dewir et al (2015) who have demonstrated the role of DHN in inhibition of lipid peroxidation in transgenic tobacco and acclimatizing African violet plants, respectively. We are of opinion that DHN might play a role in overcoming lipid peroxidation in Dieffenbachia plants during ex vitro acclimatization.…”

“…It is also believed that DHN can accumulate in the acclimatizing plants because it was reported that light induced expression of DHN during seedling de-etiolation in sunflower (Natali et al 2007). Recently, Dewir et al (2015) confirmed the accumulation of DHN in acclimatizing African violet plants and that DHN might be playing a role in overcoming lipid peroxidation during ex vitro acclimatization.…”