scholarly journals Polytolerance to abiotic stresses: how universal is the shade-drought tolerance trade-off in woody species?

2015 ◽  
Vol 24 (5) ◽  
pp. 571-580 ◽  
Author(s):  
Lauri Laanisto ◽  
Ülo Niinemets
Keyword(s):  
Drought Tolerance ◽  
Abiotic Stresses ◽  
Woody Species ◽  
Trade Off

scholarly journals Spermine: Its Emerging Role in Regulating Drought Stress Responses in Plants

Cells ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 261
Author(s):  
Md. Mahadi Hasan ◽  
Milan Skalicky ◽  
Mohammad Shah Jahan ◽  
Md. Nazmul Hossain ◽  
Zunaira Anwar ◽  
...  
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Stress Responses ◽  
Abiotic Stresses ◽  
Defense Mechanisms ◽  
Antioxidant Defense ◽  
Severe Drought ◽  
New Information ◽  
Effects Of Drought

In recent years, research on spermine (Spm) has turned up a lot of new information about this essential polyamine, especially as it is able to counteract damage from abiotic stresses. Spm has been shown to protect plants from a variety of environmental insults, but whether it can prevent the adverse effects of drought has not yet been reported. Drought stress increases endogenous Spm in plants and exogenous application of Spm improves the plants’ ability to tolerate drought stress. Spm’s role in enhancing antioxidant defense mechanisms, glyoxalase systems, methylglyoxal (MG) detoxification, and creating tolerance for drought-induced oxidative stress is well documented in plants. However, the influences of enzyme activity and osmoregulation on Spm biosynthesis and metabolism are variable. Spm interacts with other molecules like nitric oxide (NO) and phytohormones such as abscisic acid, salicylic acid, brassinosteroids, and ethylene, to coordinate the reactions necessary for developing drought tolerance. This review focuses on the role of Spm in plants under severe drought stress. We have proposed models to explain how Spm interacts with existing defense mechanisms in plants to improve drought tolerance.

scholarly journals ‘Garnem’ and Myrobalan ‘P.2175’: Two Different Drought Responses and Their Implications in Drought Tolerance

Horticulturae ◽  
2021 ◽  
Vol 7 (9) ◽  
pp. 299
Author(s):  
Beatriz Bielsa ◽  
María Ángeles Sanz ◽  
María José Rubio-Cabetas
Keyword(s):  
Transcription Factor ◽  
Drought Tolerance ◽  
Abiotic Stresses ◽  
Interspecific Hybrids ◽  
Drought Response ◽  
Breeding Programs ◽  
Wide Range ◽  
Relative Water ◽  
Aba Content ◽  
Rootstock Breeding

One of the challenges in rootstock breeding programs is the combination of tolerances to different abiotic stresses in new interspecific hybrids adapted to a wide range of environmental conditions. In this work, two Prunus L. rootstocks: Myrobalan ‘P.2175’ (P. cerasifera Ehrh.) and the almond × peach hybrid ‘Garnem’ (P. amygdalus Batsch × P. persica (L.) Batsch) were subjected to drought during 24 h to understand their drought response mechanisms. The study was conducted monitoring leaf water potential (LWP), stomatal conductance (gs), relative water content (RWC), and electrolyte leakage (EL); as well as the abscisic acid (ABA) content in roots. The relative expression of five drought-relative genes was also studied. The obtained results allowed examining the drought tolerance potential of ‘Garnem’ and Myrobalan ‘P.2175’, demonstrating the great potential of ‘Garnem’ as drought tolerance source in future selections in breeding. Furthermore, based on the obtained data, the transcription factor Myb25-like could be a good biomarker of drought sensitivity for use in Prunus rootstock breeding programs.

scholarly journals The Generality of Leaf Size versus Number Trade-off in Temperate Woody Species

2008 ◽  
Vol 102 (4) ◽  
pp. 623-629 ◽  
Author(s):  
Dongmei Yang ◽  
Guoyong Li ◽  
Shucun Sun
Keyword(s):  
Woody Species ◽  
Leaf Size ◽  
Trade Off

scholarly journals Diversity of used plant species for producing charcoal and its trade-off in Far-North Region, Cameroon

2017 ◽  
Vol 6 (2) ◽  
pp. 19-29
Author(s):  
G. Todou ◽  
M. Hassan ◽  
Akamba Ze ◽  
D. Kombo ◽  
S. Machewere ◽  
...  
Keyword(s):  
Woody Species ◽  
Production Data ◽  
Survey Questionnaire ◽  
Charcoal Production ◽  
Human Pressure ◽  
Trade Off ◽  
Far North ◽  
Multipurpose Species ◽  
Northern Regions ◽  
Phytogenetic Resources

 The Northern Regions of Cameroon belong to sudano-zambesian region. In these regions, woody species are scarce compared to Guinean-Congolese Region and they undergo the human pressure like abusive exploitation of plants. In order to contribute to valorization of phytogenetic resources and contribute to struggle desert progression in sahelian region, a study on plants diversity which are used to produce charcoal and its trade-off was carried out in Far-North Region of Cameroon. Census of plants species was made on the basis of semi-structured surveys through the producers of charcoal and identification of tree trunks on the sites of charcoal production. Data of trade of charcoal was collected by direct observation and a semi-structured survey questionnaire in Maroua. In total, 25 species grouped in 17 genera and 8 families have been recorded. Acacia and Combretum were the richest genera with four species each. They were quoted as multipurpose species which can be used elsewhere as fruits, timbers, medicinal plants or essential oils and exudates. In Maroua almost, 98 % of households use charcoal for heating. In the absence of the charcoal, up to 60 % of those use firewood, 18.46 % use domestic gas and 18.46% use kerosene. Because of poverty and unemployment, people of primary education are mostly charcoal sellers.  INTERNATIONAL JOURNAL OF ENVIRONMENTVolume-6, Issue-2, Mar-May 2017, Page: 19-29

scholarly journals Systematic Analysis of the Maize OSCA Genes Revealing ZmOSCA Family Members Involved in Osmotic Stress and ZmOSCA2.4 Confers Enhanced Drought Tolerance in Transgenic Arabidopsis

2020 ◽  
Vol 21 (1) ◽  
pp. 351
Author(s):  
Liru Cao ◽  
Pengyu Zhang ◽  
Xiaomin Lu ◽  
Guorui Wang ◽  
Zhenhua Wang ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Abiotic Stresses ◽  
Family Members ◽  
Proline Content ◽  
Protein Domain ◽  
Bimolecular Fluorescence Complementation ◽  
Systematic Analysis ◽  
Over Expression ◽  
Core Elements ◽  
Positive Correlations

OSCAs are hyperosmolality-gated calcium-permeable channel proteins. In this study, two co-expression modules, which are strongly associated with maize proline content, were screened by weighted correlation network analysis, including three ZmOSCA family members. Phylogenetic and protein domain analyses revealed that 12 ZmOSCA members were classified into four classes, which all contained DUF221 domain. The promoter region contained multiple core elements responsive to abiotic stresses and hormones. Colinear analysis revealed that ZmOSCAs had diversified prior to maize divergence. Most ZmOSCAs responded positively to ABA, PEG, and NaCl treatments. ZmOSCA2.3 and ZmOSCA2.4 were up-regulated by more than 200-fold under the three stresses, and showed significant positive correlations with proline content. Yeast two-hybrid and bimolecular fluorescence complementation indicated that ZmOSCA2.3 and ZmOSCA2.4 proteins interacted with ZmEREB198. Over-expression of ZmOSCA2.4 in Arabidopsis remarkably improved drought resistance. Moreover, over-expression of ZmOSCA2.4 enhanced the expression of drought tolerance-associated genes and reduced the expression of senescence-associated genes. We also found that perhaps ZmOSCA2.4 was regulated by miR5054.The results provide a high-quality molecular resource for selecting resistant breeding, and lay a foundation for elucidating regulatory mechanism of ZmOSCA under abiotic stresses.

The triangular space of abiotic stress tolerance in woody species: a unified trade‐off model

2020 ◽  
Vol 229 (3) ◽  
pp. 1354-1362
Author(s):  
Giacomo Puglielli ◽  
Michael J. Hutchings ◽  
Lauri Laanisto
Keyword(s):  
Abiotic Stress ◽  
Stress Tolerance ◽  
Abiotic Stress Tolerance ◽  
Woody Species ◽  
Trade Off

scholarly journals The roles of conduit redundancy and connectivity in xylem hydraulic functions

2020 ◽  
Author(s):  
Assaad Mrad ◽  
Daniel M Johnson ◽  
David M Love ◽  
Jean-Christophe Domec
Keyword(s):  
Graph Theory ◽  
Water Potential ◽  
Percolation Theory ◽  
Water Movement ◽  
Xylem Sap ◽  
Woody Species ◽  
Flowering Plants ◽  
Hydraulic Efficiency ◽  
Trade Off ◽  
Network Characteristics

Wood anatomical traits shape a xylem segment's hydraulic efficiency and embolism spread resistance due to declining water potential. Because xylem sap is in a metastable state, gas embolisms might spread within the sapwood conduits as water potential declines, inhibiting water movement. It has been known for decades that variations in conduit connectivity play a role in altering xylem hydraulics. However, evaluating the precise effect of conduit connectivity on hydraulic efficiency and embolism spread resistance has been elusive. Using graph theory, percolation theory, and computational modeling, we show that increases in conduit connectivity improves resistance to embolism spread in certain flowering plants without compromising hydraulic efficiency. The influence of conduit connectivity might explain in part why the hypothesis of the 'safety-efficiency' trade-off is weak among woody species with different xylem network characteristics. Overall, knowing how xylem network measures influence segment hydraulics is necessary to generalize trends linking anatomy and hydraulic function among woody species.

Trade-off between leaf turnover and biochemical responses related to drought tolerance in desert woody plants

2014 ◽  
Vol 103 ◽  
pp. 107-113 ◽  
Author(s):  
Zijuan Zhou ◽  
Peixi Su ◽  
Luciana González-Paleo ◽  
Tingting Xie ◽  
Shanjia Li ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Woody Plants ◽  
Trade Off ◽  
Biochemical Responses ◽  
Leaf Turnover
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