scholarly journals Effect of drought stress on yield and yield components, relative leaf water content, proline and potassium ion accumulation in different white bean (Phaseolus vulgaris L.) genotype

2012 ◽  
Vol 7 (42) ◽  
pp. 5661-5670 ◽  
Author(s):  
Zadehbagheri Masoud ◽  
Mojtaba Mohammad ◽  
Kamelmanesh ◽  
Javanmardi Shoorangiz ◽  
Sharafzadeh Shahram
Keyword(s):  
Drought Stress ◽  
Phaseolus Vulgaris ◽  
Water Content ◽  
Yield Components ◽  
Ion Accumulation ◽  
Leaf Water ◽  
Leaf Water Content ◽  
Phaseolus Vulgaris L ◽  
Yield And Yield Components ◽  
White Bean

Effect of Seedbed Type on Yield and Yield Components of Common bean (Phaseolus vulgaris L.) Commercial Cultivars

2006 ◽  
Vol 5 (4) ◽  
pp. 583-588 ◽  
Author(s):  
Loth S. Mulungu ◽  
Akwilin J.P. Tarim ◽  
Shazia O.W.M. Reuben . ◽  
Daniel N. Lema . ◽  
Rhodes H. Makundi . ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Yield Components ◽  
Phaseolus Vulgaris L ◽  
Commercial Cultivars ◽  
Yield And Yield Components

scholarly journals Physiological Effects of Drought Stress on Two Commercial Cultivars of the American Cranberry (Vaccinium macrocarpon)

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 772A-772
Author(s):  
Ricardo Cesped-Ruiz* ◽  
Bingru Huang
Keyword(s):  
Drought Stress ◽  
Stomatal Conductance ◽  
Water Content ◽  
Air Temperature ◽  
Photosynthetic Rate ◽  
Leaf Water ◽  
Leaf Water Content ◽  
Psii Efficiency ◽  
American Cranberry ◽  
Effects Of Drought

The American cranberry often undergoes drought stress during the summer. However, the physiological response of this species to drought is not well understood. This study was designed to determine the effects of drought on two commercial cranberry cultivars of high potential yield, `Ben Lear' and `Stevens', during a vegetative stage. The plants were subjected to drought for 15 days in a greenhouse. Soil water content, leaf water content, leaf photosynthetic rate, stomatal conductance, transpiration, differential leaf-air temperature, photochemical efficiency (Fv'/Fm') and the actual PSII efficiency (deltaF/Fm') decreased in those plants subjected to drought. Drought reduced differential leaf-air temperature at day 6 of treatment and stomatal conductance and transpiration starting at day 9 and photosynthetic rate at day 13. Drought decreased leaf water content at day 14 and Fv'/Fm' and PSII efficiency at day 15. Our results indicated that cranberry plants in vegetative stage were sensitive to drought for both cultivars and stomatal conductance was the most sensitive parameter among those examined for both cultivars.

scholarly journals Osmotic Potential, Sucrose Level, and Activity of Sucrose Metabolic Enzymes in Tall Fescue in Response to Deficit Irrigation

2010 ◽  
Vol 135 (6) ◽  
pp. 506-510 ◽  
Author(s):  
Jinmin Fu ◽  
Bingru Huang ◽  
Jack Fry
Keyword(s):  
Drought Stress ◽  
Water Content ◽  
Tall Fescue ◽  
Osmotic Potential ◽  
Deficit Irrigation ◽  
Leaf Water ◽  
Leaf Water Content ◽  
Severe Drought ◽  
The Impact ◽  
Sucrose Level

Effects of deficit irrigation applied to home lawns, used as means of water conservation, are an important issue. However, the impact of deficit irrigation on sucrose metabolism in tall fescue (Festuca arundinacea) is unknown and important because sucrose is the dominant form of carbohydrate transported to developing plant organs. The objectives of this study were to investigate the effects of deficit irrigation on leaf water content, osmotic potential (ψS), sucrose level, and the activity of sucrose phosphate synthase (SPS; EC 2.4.1.14), sucrose synthase (SS; EC 2.4.1.13), and acid invertase (AI; EC 3.2.1.26) in tall fescue leaves. Sods of ‘Falcon II’ tall fescue were established in polyvinylchloride (PVC) tubes (10 cm diameter × 40 cm long) filled with a mixture of sand and fritted clay [9:1 (v:v)] and then placed in growth chambers. Reference evapotranspiration rate [ETo (millimeters of water per day)] was determined by weighing the PVC tubes containing well-watered turfgrass every 3 days to determine water loss on a daily basis as ETo. Deficit irrigation treatments were applied as follows: well-watered control, mild drought stress (60% ETo), and severe drought stress (20% ETo). Leaf water content was lower at 6, 12, and 20 days of treatment for the 20% ETo treatment and 20 days after treatment began for the 60% ETo treatment. Compared with the well-watered control, ψS was lower in the 60% ETo treatment on all three measurement dates. Sucrose was higher at 8 and 14 days after treatment began in the 60% ETo treatment and on all three measurement dates in the 20% ETo treatment relative to the well-watered control. No difference in sucrose level was observed between the 20% ETo and 60% ETo irrigation regimes at 8 and 14 days of treatment. Beginning 14 days after treatment, tall fescue had a higher level of SPS in the 60% ETo and 20% ETo treatments compared with the well-watered treatment. Tall fescue receiving 60% or 20% ETo had a lower level of AI activity on all measurement dates. Results suggest that the decrease in ψS was accompanied by higher sucrose levels, which were the result of the increased level of SPS and SS activity and a decline in AI activity.

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