Colchicine was used as chemical mutagen for In vitro induction of polyploids. Nodal segments of In vitro grown marigold plantlets were cultured on MS medium supplemented with four different concentrations of colchcine (0.0%, 0.001%, 0.01% and 0.05%) for 12h, separately. After treatment, nodal segment were shifted to colchicine free MS medium for normal growth. Highest mortality rate (72.74%) an...

Stomata, epidermal valves facilitating plant-atmosphere gas exchange, represent a powerful model for understanding cell fate and pattern in plants. Core basic helix-loop-helix (bHLH) transcription factors regulating stomatal development were identified in Arabidopsis, but this dicot's developmental pattern and stomatal morphology represent only one of many possibilities in nature. Here, using u...

Root development is influenced by nutrient and water availabilities. Plants are able to adjust many attributes of their root in response to environmental signals including the size and shape of the primary root, lateral roots and root hairs. Here we investigated the response of roots to changes in the levels of leaf transpiration associated with altered stomatal frequency. We found that plants ...

Circadian resonance, whereby a plant's endogenous rhythms are tuned to match environmental cues, has been repeatedly shown to be adaptive, although the underlying mechanisms remain elusive. Concomitantly, the adaptive value of nocturnal transpiration in C3 plants remains unknown because it occurs without carbon assimilation. These seemingly unrelated processes are interconnected because circadi...

Studies of the water relations of potassium deficient sugarbeet plants (Beta vulgaris L.) revealed two factors for stomatal closure. One component of stomatal closure was reversible by floating leaf discs on distilled water to relieve the water deficit in the leaves; the other component was reversible in the light by floating the leaf discs on KCl solution for 1 hour or more. Potassium-activate...

Flooding induced several physiological and morphological changes in Fraxinus pennsylvanica seedlings, with stomatal closure among the earliest responses. Subsequent changes included: reduction in dry weight increment of roots, stems, and leaves; formation of hypertrophied lenticels and production of adventitious roots on submerged portions of the stem above the soil line; leaf necrosis; and lea...

Currently, limited knowledge is available about the combined effects of drought and light in case cold stress. The investigation quantum yield kinetics may help understand how plants utilize under adverse environmental conditions. In present study, mild helped preserve durum wheat (Triticum L.). time necessary to reach steady-state actual corresponded with sensitivity. Possible underlying mecha...