Influence of water table decline on growth allocation and endogenous gibberellins in black cottonwood

Rood, Stewart B.; Zanewich, Karen P.; Stefura, Corey; Mahoney, John M.

doi:10.1093/treephys/20.12.831

Cited by 30 publications

(17 citation statements)

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“…We also expected correlations between senescence patterns and underlying physiological patterns of xylem water potential and stomatal conductance (Kelliher et al 1980;Braatne et al 1992;Mahoney and Rood 1992;Blake et al 1996;Rood et al 2000b). We thus anticipated physiological recovery that would be accompanied by similar patterns of senescence and abscission in the recovering grove and in nearby control groves.…”

Section: Introductionmentioning

confidence: 88%

“…Transpirational demand is very high in Populus trees and although there are some interesting exceptions (Schulte et al 1992), reducing g s through stomatal closure generally provides a principal mechanism by which Populus reduces water loss (Kelliher et al 1980;Blake et al 1996;Tschaplinski et al 1998;Sparks and Black 1999;Rood et al 2000b). Consistent with this, g s was considerably reduced in leaves of the trees in the droughtaffected grove in 1998.…”

Section: Water Relationsmentioning

confidence: 99%

“…Reductions in leaf area by leaf senescence and abscission and by the sacrifice of whole branches provide additional mechanisms to reduce transpirational demand and mitigate water stress in Populus (Albertson and Weaver 1945;Braatne et al 1992;Busch and Smith 1995;Rood et al 2000aRood et al , 2000b. In controlled studies, drought stress either by reduced watering or water table depletion induces cottonwood leaf senescence and increased abscission (Schulte et al 1987;Mahoney and Rood 1991;Kranjcec et al 1998;Amlin and Rood 2002).…”

Section: Water Relationsmentioning

confidence: 99%

See 2 more Smart Citations

Drought stress and recovery of riparian cottonwoods due to water table alteration along Willow Creek, Alberta

Amlin

Rood

2003

Trees

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Section: Introductionmentioning

confidence: 88%

Section: Water Relationsmentioning

confidence: 99%

Section: Water Relationsmentioning

confidence: 99%

See 1 more Smart Citation

Drought stress and recovery of riparian cottonwoods due to water table alteration along Willow Creek, Alberta

Amlin

Rood

2003

Trees

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“…Thus, several studies showed that under drought the endogenous GAs levels markedly decreased because this stress appeared to inhibit the GA biosynthesis and/or increase its degradation. Early reports demonstrated that drought reduced the GAs accumulation in lettuce [53], cottonwood saplings [54] and in rice grains during early grain filling [55]. Similarly, in leaves of unstressed and water stressed maize seedlings showed that GA 3 decreased considerably during drought [56].…”

Section: Effect Of Gas On Plant Growth Responses Under Drought and Samentioning

confidence: 97%

Alterations of Endogenous Hormonal Levels in Plants under Drought and Salinity

Llanes¹,

Andrade²,

Alemano³

et al. 2016

AJPS

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The phytohormones are pivotal chemical messengers produced within the plant that regulate its growth and development, and responses to environmental stimuli. Drought and salinity are adverse environmental factors that disturb the plant hormonal balance. Accordingly, these hormonal fluctuations modify the cellular dynamic and hence they play a central role in regulating plant growth responses to abiotic stresses such as drought and salinity. The present review gives an update about the alterations of endogenous phytohormones such as abscisic acid (ABA), auxins (Aux), cytokinins (CKs), ethylene (ET), gibberellins (GAs), jasmonates (JAs), salicylic acid (SA), brassinosteroids (BRs), strigolactones (SLs) and nitric oxide (NO) that occur as part of the adaptative responses of plant against drought and salt stresses. Better understanding of the endogenous hormonal changes during the plant response to both abiotic stresses will contribute, in part, to the development of stress-tolerant plants.

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“…Wa ter stress re duced ac cu mu la tion of GAs in cot ton wood sap lings (Rood et al 2000) and in rice grains in the early grain fill ing stage (Yang et al 2001). Wa ter def i cit leads to ac cu mu la tion of abscisic acid (ABA) (Gomes et al 2002). In ad di tion to its well es tab lished role in clos ing stomata, there is also ev i dence that ABA in creases the in flux of ions across mem branes in the root and the syn the sis and ac cu mu la tion of os mot i cally ac tive sol utes (LaRosa et al 1987).…”

Section: Introductionmentioning

confidence: 99%

Gibberellic acid improves water deficit tolerance in maize plants

2006

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Ab stractThe com bi na tion ef fects of wa ter stress and gibberellic acid (GA 3 ) on phys i o log i cal at trib utes and nu tri tional sta tus of maize (Zea mays L. cv., DK 647 F1 ) were stud ied in a pot exper i ment. Maize plants were grown in the con trol (well watered WW) and wa ter stress sub jected to treated both wa ter stress and two con cen tra tions of gibberellic acid (GA 3 25 mg·L -1 , 50 mg·L -1 ). WS was im posed by main tain ing the moisture level equiv a lent to 50 % pot ca pac ity whereas the WW pots were main tained at full pot ca pac ity. Wa ter stress re duced the to tal dry weight, chlo ro phyll con cen tra tion, and leaf rel ative wa ter con tent (RWC), but it in creased proline ac cu mu lation and elec tro lyte leak age in maize plants and ap pears to affect shoots more than roots. Both con cen tra tions of GA 3 (25 and 50 mg·L -1 ) largely en hanced the above phys i o log i cal param e ters to lev els sim i lar to con trol. WS re duced leaf Ca 2+ and K + con cen tra tions, but ex og e nous ap pli ca tion of GA 3 increased those nu tri ent lev els sim i lar or close to con trol. Ex og enous ap pli ca tion of GA 3 im proved the wa ter stress tol er ance in maize plants by main tain ing mem brane per me abil ity, en hancing chlo ro phyll con cen tra tion, leaf rel a tive wa ter con tent (LRWC) and some macro-nu tri ent con cen tra tions in leaves.List of abbreviations: GA 3 -Gibberellic acid; LRWC-Leaf rel a tive wa ter con tent; WW-Well wa tered; WS-wa ter stress In tro duc tionMaize is grown all over the world un der a wide range of cli mates. Drought is the main con straint for maize, caus ing se vere yield re duc tions (Maiti et al. 1996). Genotypic dif fer ences have been iden tified for a range of mor pho log i cal and phys i o log i cal char ac ter is tics (Ackerson 1983) as well as growth re sponses of maize to wa ter def i cit (O'Regan et al. 1993, Sinclair et al. 1990).Con trary to other fac tors that may limit crop yields (e.g. acid, al ka line or sa line soils) wa ter avail abil ity is highly vari able dur ing crop grow ing sea son and dif fers from year to year. As a con se quence, wa ter def i cit is an ubiq ui tous lim it ing fac tor in ag ri culture, es pe cially in semi-arid re gions (Gutier rez --Boem and Thomas 1999).The ef fects of wa ter def i cit on plant phys i ol ogy very de pends on the spe cies and de gree of tol erance. Gen er ally, drought quickly af fects the processes re lated to cell tur gid ity and par tic u larly the growth of the meristem (Figueiredo et al. 1999).In re la tion to en vi ron men tal ef fects, irradiance and low tem per a ture in duced changes in GA me tab olism were re viewed by Hedden (1999), but lit tle is known about changes in duced by wa ter stress (Pos -331 ACTA PHYSIOLOGIAE PLANTARUM

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Influence of water table decline on growth allocation and endogenous gibberellins in black cottonwood

Cited by 30 publications

References 17 publications

Drought stress and recovery of riparian cottonwoods due to water table alteration along Willow Creek, Alberta

Drought stress and recovery of riparian cottonwoods due to water table alteration along Willow Creek, Alberta

Alterations of Endogenous Hormonal Levels in Plants under Drought and Salinity

Gibberellic acid improves water deficit tolerance in maize plants

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