jasmonate is new plant growth regulator that plays an essential role at increasing plants resistance to the environmental stresses like salinity stress. hence, in this research the effect of foliar application of methyl jasmonate on some physiological indices and yield of german chamomile under salinity conditions was studied. a factorial experiment was laid out based on randomized complete blo...

There is a trade-off between nitrogen (N) allocation to photosynthesis and to defence. Invasive species may reduce N allocation to defence because of the absence of natural enemies. Thus, I hypothesised that invasive species may allocate a higher fraction of total leaf N to photosynthesis and have higher light-saturated photosynthetic rate (P(max)) and photosynthetic N-use efficiency (PNUE) tha...

Improving water use efficiency (WUE) may prove a useful way to adapt crop species to drought. Since the recognition of the importance of mesophyll conductance to CO₂ movement from inside stomatal pores to the sites of photosynthetic carboxylation, there has been interest in how much intraspecific variation in mesophyll conductance (gm) exists, and how such variation may impact leaf WUE within C...

The effect of photosynthetic photon flux density (PPFD) on photosynthetic response (A) to CO(2) partial pressures between 35 pascals and CO(2) compensation point (Gamma) was investigated, especially below PPFD saturation. Spinacia oleracea cv ;Atlanta,' Glycine max cv ;Clark,' and Arbutus unedo were studied in detail. The initial slope of the photosynthetic response to CO(2) ( partial different...

Background: Medical plants production, including borago, is for maximum productivity from their effective ingredients’. Flowers, leaves and seed oil are medical parts of borago. Unfortunately, because of little breeding and domestication programs in medical plants, including borago, their establishments are usually slow. One of the effective techniques for solving this problem is seed priming. ...

Leaves are beautifully specialized organs that enable plants to intercept light necessary for photosynthesis. The light is dispersed among a large array of chloroplasts that are in close proximity to air and yet not too far from vascular tissue, which supplies water and exports sugars and other metabolites. To control water loss from the leaf, gas exchange occurs through pores in the leaf surfa...

Abstract Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco), the key CO 2 -fixing enzyme in photosynthesis, is notorious for its low carboxylation. We report a highly active and assembly-competent Form II Rubisco from endosymbiont of deep-sea tubeworm Riftia pachyptila (RPE Rubisco), which shows 50.5% higher carboxylation efficiency than that high functioning Synechococcus sp. PCC7002 (7...