scholarly journals Influence of Cadmium on Water Relations, Stomatal Resistance, and Abscisic Acid Content in Expanding Bean Leaves

1989 ◽  
Vol 90 (4) ◽  
pp. 1365-1371 ◽  
Author(s):  
Charlotte Poschenrieder ◽  
Benet Gunsé ◽  
Juan Barceló
Keyword(s):  
Abscisic Acid ◽  
Water Relations ◽  
Acid Content ◽  
Stomatal Resistance ◽  
Abscisic Acid Content ◽  
Bean Leaves

Effect of ethylene perception inhibitor on growth, water relations, and abscisic acid content in wheat plants under water deficit

2012 ◽  
Vol 59 (4) ◽  
pp. 573-580 ◽  
Author(s):  
G. V. Sharipova ◽  
D. S. Veselov ◽  
G. R. Kudoyarova ◽  
M. D. Timergalin ◽  
S. Wilkinson
Keyword(s):  
Abscisic Acid ◽  
Water Deficit ◽  
Water Relations ◽  
Acid Content ◽  
Abscisic Acid Content

scholarly journals Drought Response of Young Apple Trees on Three Rootstocks. II. Gas Exchange, Chlorophyll Fluorescence, Water Relations, and Leaf Abscisic Acid

1997 ◽  
Vol 122 (6) ◽  
pp. 841-848 ◽  
Author(s):  
R. Thomas Fernandez ◽  
Ronald L. Perry ◽  
James A. Flore
Keyword(s):  
Abscisic Acid ◽  
Chlorophyll Fluorescence ◽  
Drought Stress ◽  
Gas Exchange ◽  
Water Relations ◽  
Acid Content ◽  
Recovery Period ◽  
Leaf Conductance ◽  
Apple Trees ◽  
Abscisic Acid Content

`Imperial Gala' apple trees (Malus ×domestica Borkh.) on M.9 EMLA, MM.111, and Mark rootstocks were subjected to two drought-stress and recovery periods in a rainshelter. Water relations, gas-exchange parameters per unit leaf area and per tree, chlorophyll fluorescence, and leaf abscisic acid content were determined during each stress and recovery period. Whole-plant calculated gas exchange best indicated plant response to drought stress, with consistent reductions in CO2 assimilation, transpiration, and leaf conductance. Variable and maximal chlorophyll fluorescence and fluorescence quenching were not as sensitive to stress. Other fluorescence parameters showed little difference. The most consistent decreases due to stress for gas exchange per square meter were in transpiration and leaf conductance, with few differences in CO2 assimilation and fewer for mesophyll conductance, internal CO2 concentration, and water-use efficiency. Leaf water potential was consistently lower during drought stress and returned to control values upon irrigation. Leaf abscisic acid content was higher for drought-stressed trees on M.9 EMLA than control trees during the stress periods but inconsistently different for the other rootstock treatments. Trees on M.9 EMLA were least affected by drought stress, MM.111 was intermediate, and Mark was the most sensitive; these results are consistent with the growth data.

scholarly journals Studies on the Growth and Indole-3-Acetic Acid and Abscisic Acid Content of Zea mays Seedlings Grown in Microgravity

1992 ◽  
Vol 100 (2) ◽  
pp. 692-698 ◽  
Author(s):  
Aga Schulze ◽  
Philip J. Jensen ◽  
Mark Desrosiers ◽  
J. George Buta ◽  
Robert S. Bandurski
Keyword(s):  
Zea Mays ◽  
Acetic Acid ◽  
Abscisic Acid ◽  
Acid Content ◽  
Abscisic Acid Content ◽  
Indole 3 Acetic Acid

scholarly journals Interactions between leaf water potential, stomatal conductance and abscisic acid content of orange trees submitted to drought stress

2004 ◽  
Vol 16 (3) ◽  
pp. 155-161 ◽  
Author(s):  
Mara de Menezes de Assis Gomes ◽  
Ana Maria Magalhães Andrade Lagôa ◽  
Camilo Lázaro Medina ◽  
Eduardo Caruso Machado ◽  
Marcos Antônio Machado
Keyword(s):  
Abscisic Acid ◽  
Water Stress ◽  
Stomatal Conductance ◽  
Water Potential ◽  
Leaf Water Potential ◽  
Acid Content ◽  
Stomatal Closure ◽  
Leaf Water ◽  
Orange Trees ◽  
Abscisic Acid Content

Thirty-month-old 'Pêra' orange trees grafted on 'Rangpur' lemon trees grown in 100 L pots were submitted to water stress by the suspension of irrigation. CO2 assimilation (A), transpiration (E) and stomatal conductance (g s) values declined from the seventh day of stress, although the leaf water potential at 6:00 a.m. (psipd) and at 2:00 p.m. (psi2) began to decline from the fifth day of water deficiency. The CO2 intercellular concentration (Ci) of water-stressed plants increased from the seventh day, reaching a maximum concentration on the day of most severe stress. The carboxylation efficiency, as revealed by the ratio A/Ci was low on this day and did not show the same values of non-stressed plants even after ten days of rewatering. After five days of rewatering only psi pd and psi2 were similar to control plants while A, E and g s were still different. When psi2 decreases, there was a trend for increasing abscisic acid (ABA) concentration in the leaves. Similarly, stomatal conductance was found to decrease as a function of decreasing psi2. ABA accumulation and stomatal closure occurred when psi2 was lower than -1.0 MPa. Water stress in 'Pera´ orange trees increased abscisic acid content with consequent stomatal closure and decreased psi2 values.

Abscisic Acid Content and Osmotic Relations of Salt-Stressed Grapevine Leaves

1981 ◽  
Vol 8 (5) ◽  
pp. 443 ◽  
Author(s):  
WJS Downton ◽  
BR Loveys
Keyword(s):  
Abscisic Acid ◽  
Acid Concentration ◽  
Stomatal Resistance ◽  
Vitis Vinifera L ◽  
Phaseic Acid ◽  
Ion Content ◽  
Grapevine Leaves ◽  
Abscisic Acid Content ◽  
Osmotic Potentials ◽  
Reducing Sugar Concentration

Changes in abscisic acid, phaseic acid, stomatal resistance, water potential, osmotic potential, turgor potential, proline, reducing sugars and ion content (Na+, K+, Cl-) in leaves from grapevines (Vitis vinifera L.) subjected to 0, 25, 50 or 100 mM NaCl (osmotic potentials of 0, - 0.1, - 0.2 and - 0.4 MPa, respectively) were monitored over a 3-week period. Abscisic acid concentration increased within 6 h for the 50 and 100 mM NaCl-treated vines. Proline did not accumulate until the next day for the 100 mM NaCl-treated plants and continued to accumulate for the duration of the experiment. Phaseic acid showed kinetics consistent with its being derived from abscisic acid. Stomatal resistance to water vapour exchange increased in the salt-treated plants over the course of the experiment despite a decline in abscisic acid concentration after the initial upsurge. Reducing sugar concentration showed an early upsurge, its contribution to osmotic readjustment being at least equal to that of accumulated Na+, K+ and Cl- the day after stress began. Potassium was preferentially accumulated over sodium into leaves during the first 8 days of the experiment and the sum of these two cations generally balanced accumulating chloride. Except for an initial loss of turgor in vines given 100 mM NaCl, turgor potential was maintained within 0.1 MPa of control plants for all of the treatments throughout the experiment.

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