Evaluation of Photosynthetic Pigment, Antioxidant and Non-Antioxidant Activity some Morphological Traits Changes under Drought Stress in Castor Plant (Ricinus communis L.)

Nitric oxide (NO) is a bioactive molecule, which was found to have several physiological roles, including antioxidant. To have a better understanding of the effects of NO concentrations (0, 0.1 and 0.2 mM) on germination, growth, photosynthetic pigments, lipid peroxidation and antioxidant activity of basil (Ocimum basilicum L.) under different salinity concentrations (0, 100 and 200 mM of NaCl)...

NADPH:protochlorophyllide oxidoreductase (POR) catalyzes hydrogen transfer from NADPH to protochlorophyllide (PChlide) in the course of chlorophyll biosynthesis in photosynthetic organisms and is involved in the regulation of the development of photosynthetic apparatus in higher plants, algae and cyanobacteria. To approach molecular factors determining the enzyme activity in a living cell, seve...

a competent photosynthetic apparatus at low temperature is the basis for their more vigorous growth in The changes in photosynthetic activity and composicool climates. tion of pigments induced by changes in temperature were examined in the third leaf of three chilling

It is known that numerous stimuli induce electrical signals which can increase a plant's tolerance to stressors, including high temperature. However, the physiological role of local electrical responses (LERs), i.e., responses in the zone of stimulus action, in the plant's tolerance has not been sufficiently investigated. The aim of a current work is to analyze the connection between parameters...

High resolution chlorophyll a fluorescence imaging was used to compare the photosynthetic efficiency of PSII electron transport (estimated by Fq'/Fm') in guard cell chloroplasts and the underlying mesophyll in intact leaves of six different species: Commelina communis, Vicia faba, Amaranthus caudatus, Polypodium vulgare, Nicotiana tabacum, and Tradescantia albifora. While photosynthetic efficie...

Photosynthetic rates of six pistachio cultivars were studied including Ohadi, Kalleh-Ghochi, Akbari, AhmadAghaii, Rezaii Zoudras and Haratii. Measurements were done using OFF and ON shoots at different stages of fruit growth and development included: - Beginning of endocarp growth; - pith hardening; - Beginning of endosperm rapid growth; - end of embryo development; - ripening and harvesting ti...

During desiccation, homoiochlorophyllous resurrection plants retain most of their photosynthetic apparatus, allowing them to resume photosynthetic activity quickly upon water availability. These plants rely on various mechanisms to prevent the formation of reactive oxygen species and/or protect their tissues from the damage they inflict. In this work, we addressed the issue of how homoiochlorop...