Modification of water entry (xylem vessels) and water exit (stomata) orchestrates long term drought acclimation of wheat leaves

Bresta, Panagiota; Nikolopoulos, Dimosthenis; Economou, George; Vahamidis, Petros; Lyra, Dionyssia; Karamanos, A. J.; Karabourniotis, George

doi:10.1007/s11104-011-0837-4

Cited by 25 publications

(18 citation statements)

References 53 publications

(61 reference statements)

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“…Possibly, at the leaf level, physiological adjustments through efficient stomatal closure, as previously demonstrated (Silva et al 2013), might be of greater importance than alterations in leaf hydraulics mediated by structural changes. Similar assumptions have been made for other crop species, such as wheat (Bresta et al 2011). …”

Section: The Xylem Structural Changes Are Well Integrated Through Woomentioning

confidence: 91%

“…Under drought stress, the hydraulic efficiency of the leaf venation system is coordinated with leaf gas exchange rates (Nardini and Salleo 2005). The combination of lower hydraulic conductance associated with narrower vessels and higher stomatal and vein densities has been observed in the drought-acclimated leaves of wheat, for example (Bresta et al 2011), which shifts water transfer and consumption to a safe mode to compensate for the adverse effects of water shortage.…”

Section: Introductionmentioning

confidence: 99%

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Wood density, but not leaf hydraulic architecture, is associated with drought tolerance in clones of Coffea canephora

Menezes‐Silva

Cavatte

Martins

et al. 2015

Trees

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Key message This study highlights that wood density integrates the xylem structural changes and plays a key role in drought tolerance at the intraspecific level in clones of robusta coffee. Abstract Robusta coffee (Coffea canephora) is largely cropped in regions where drought stress is the major bottleneck limiting crop yields. We hypothesized that clonal differences in wood density (D w ) would be reflected in xylem anatomical differences with associated consequences for hydraulic functioning and ultimately drought tolerance. We assessed the major functional properties of water conduction systems at both the leaf and stem levels in 8-year-old clones of robusta coffee with varying degrees of drought tolerance. The plants were grown outdoors in 24-L pots and either irrigated or subjected to a 4-month water deficit. Upon drought imposition, increased D w , primarily associated with a rearrangement of the fiber matrix and secondarily associated with narrower vessels (although more numerous per cross-sectional area), was correlated with tolerance to hydraulic dysfunctions. Some coordination at the leaf level concerning hydraulic and stomatal anatomical patterns, with stem structural properties, was observed under ample irrigation, but this coordination was decoupled by the imposed drought stress. In conclusion, our data suggest a role for D w in drought tolerance in coffee; however, drought tolerance implies that clones that successfully thrive under low water supply might have compromised fitness under ample irrigation, suggesting a trade-off between D w and the conduction capacity in coffee.

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Section: The Xylem Structural Changes Are Well Integrated Through Woomentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Wood density, but not leaf hydraulic architecture, is associated with drought tolerance in clones of Coffea canephora

Menezes‐Silva

Cavatte

Martins

et al. 2015

Trees

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“…Larger xylem vessels are related to a higher hydraulic conductance (Rodríguez-Gamir et al 2010). Efficient xylem is characterized by wide conduits and long vessels (Bresta et al 2011).…”

Section: Hydrenchyma (Lm)mentioning

confidence: 99%

Impacts of photoautotrophic and photomixotrophic conditions on in vitro propagated Billbergia zebrina (Bromeliaceae)

Martins

Verdoodt

Pasqual

et al. 2015

Plant Cell Tiss Organ Cult

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Micro-propagation techniques contribute to the multiplication of several bromeliad species. However, micropropagated plantlets often present low survival rate due to anatomical and physiological disorders induced by in vitro conditions. This study aimed to evaluate the sucrose and gas exchange impact on in vitro propagated Billbergia zebrina plants and to check if there is any residual effect of the in vitro conditions on micropropagated plants after acclimatization. Previously in vitro-established B. zebrina plants were transferred to culture media containing 0.0, 15.0, 30.0, 45.0 or 60.0 g L -1 sucrose. Two different culture container sealing systems were tested: lids with a filter (permitting an excellent gas exchange) and a filter covered with PVC (blocking fluent gas exchange). At 45 days in vitro growth, B. zebrina plantlets were transplanted onto plastic pots containing peat and cultivated for 80 days in greenhouse. At 45 days in vitro and 80 days of acclimatization in the greenhouse, the plants were evaluated. High sucrose levels in the in vitro media resulted in reduced growth. Plantlets exposed to aerated containers presented better rooting, being the sugar-free medium the best in vitro condition (photoautotrophic condition). Limited air exchange resulted in plantlets with anatomical and physiological disorders at the end of the in vitro period. The highest growth rate in the greenhouse was observed in plants previously propagated in unlimited gas exchange system and sugar-free medium. The use of photoautotrophic conditions induces B. zebrina plantlets without anatomical and physiological disorders and it interfere positively on ex vitro growth.

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“…The quantification and evaluation of the genotypic differences is difficult when multiple growth characteristics are involved (Bresta et al, 2011). Using conventional approaches, genotypes are scored on single characters and the ranking is often inaccurate and cumbersome (Zeng et al, 2002;Zeng, 2005;Lee at al., 2005).…”

Section: Introductionmentioning

confidence: 99%

Evaluating the growth performance of eleven Salicornia bigelovii populations under full strength seawater irrigation using multivariate analyses

Lyra¹,

Ismail²,

Butt³

et al. 2016

Aust J Crop Sci

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Halophytes constitute an indispensable part of seawater farming systems implemented in coastal areas of desert lands where they do not compete with good quality land and water resources. Salicornia bigelovii is considered one of the most promising halophytic species that can grow in a biosaline context. However, suitable germplasm needs to be identified, domesticated and improved in order to achieve high yields to compete economically to conventional crops. In the current study, eleven S. bigelovii Torr. populations were evaluated for 22 growth parameters and irrigated with full-strength seawater (SW≈55 dS/m).The study assessed the adaptability of such plant material under the hot and dry climatic conditions that prevail in the Arabian Peninsula. High variation was observed among S. bigelovii populations for most of the characteristics under study. S. bigelovii genotypes were categorized in four groups based on their growth performance and use: for seed production, green biomass as vegetables for human consumption, and biomass as livestock feed; the fourth category was comprised of those halophytic genotypes that demonstrated poor overall performance. Pearson correlation analysis highlighted positive and negative associations among the growth parameters. Path analysis unveiled some interesting interrelationships among growth parameters that could be used for further selection to increase seed production such as number of seeds per spike, number of branches, days to flowering and duration of seed maturity. Plant height and growth cycle could be selected for biomass improvement. The multivariate statistical analyses applied in this study, i.e. clustering, correlation and path analyses were very effective in classifying S. bigelovii genotypes and revealed interrelationships among growth traits that could be selected towards S. bigelovii improvement in terms of seed and biomass yield.

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Modification of water entry (xylem vessels) and water exit (stomata) orchestrates long term drought acclimation of wheat leaves

Cited by 25 publications

References 53 publications

Wood density, but not leaf hydraulic architecture, is associated with drought tolerance in clones of Coffea canephora

Wood density, but not leaf hydraulic architecture, is associated with drought tolerance in clones of Coffea canephora

Impacts of photoautotrophic and photomixotrophic conditions on in vitro propagated Billbergia zebrina (Bromeliaceae)

Evaluating the growth performance of eleven Salicornia bigelovii populations under full strength seawater irrigation using multivariate analyses

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