scholarly journals The effects of drought and supplemental UV-B radiation on physiological and biochemical traits of the grapevine cultivar “Soultanina”

OENO One ◽  
2020 ◽  
Vol 54 (4) ◽  
pp. 687-698
Author(s):  
George Doupis ◽  
Konstantinos S. Chartzoulakis ◽  
Demetris Taskos ◽  
Angelos Patakas
Keyword(s):  
Synergistic Effects ◽  
Daily Basis ◽  
Zeatin Riboside ◽  
Vitis Vinifera L ◽  
H2o2 Production ◽  
Adaptive Responses ◽  
Grapevine Cultivar ◽  
Abiotic Stressors ◽  
Effects Of Drought ◽  
Physiological And Biochemical

Aim: In the Mediterranean region, grapevines usually undergo drought and high UV-B intensities during their summer growth season. The present study was conducted in order to evaluate the effects of these two abiotic stressors on the physiological and biochemical characteristics of a major Greek raisin variety (Vitis vinifera L. cv Soultanina).Methods and results: The experimental plants were three-years-old, grafted onto 110R rootstock and grown outdoors in 25 L pots containing a peat:perlite:sand (3:1:1, v/v/v) potting mixture. Grapevines were subjected to two irrigation treatments: (1) Well-Watered (plants were uniformly irrigated on a daily basis to soil substrate capacity), and (2) Water-Stressed (plants were equally irrigated with 50 % of the amount of water provided to Well-Watered plants), and to two levels of UV-B radiation: (1) ambient UV-B radiation, and (2) ambient plus 15 % UV-B radiation. Although the combination of drought and supplemental UV-B radiation appeared to have synergistic effects on gas exchange characteristics and H2O2 production, the development of biochemical limitations to photosynthesis was not detectable. Compared to the other stress treatments, WW±15 % UV-B plants exhibited higher stomatal conductance (gs) and photosynthetic rate (PN).Conclusion: Under elevated UV-B radiation, superoxide dismutase (SOD) activation, chlorophyll degradation and enhanced synthesis of carotenoids all helped the plant to maintain its physiological functions, while in Water-Stressed plants irrespective of the level of UV-B, a more pronounced role of abscisic acid (ABA) and trans-zeatin-riboside (t-ZR) in mediating stomatal responses was revealed.Significance of the study: Our results imply that the environmental conditions were not stressful enough to report the occurrence of non-diffusional limitations to photosynthesis. In addition, two different adaptive responses in relation to the applied abiotic stressor were shown.

scholarly journals Seasonal and daily variations in primary and secondary metabolism of three maquis shrubs unveil different adaptive responses to Mediterranean climate

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Antonella Gori ◽  
Massimiliano Tattini ◽  
Mauro Centritto ◽  
Francesco Ferrini ◽  
Giovanni Marino ◽  
...  
Keyword(s):  
Secondary Metabolism ◽  
Daily Basis ◽  
Carotenoid Content ◽  
Adaptive Responses ◽  
Coastal Habitat ◽  
Biochemical Status ◽  
Great Investment ◽  
Primary And Secondary Metabolism ◽  
Mediterranean Shrubs ◽  
Physiological And Biochemical

Abstract Maquis species play a central role in the maintenance of coastal ecosystems thanks to anatomical, physiological and biochemical features evolved to cope with severe stress conditions. Because the seasonal and daily dynamics of physiological and biochemical traits of maquis species are not fully addressed, we performed a field study on three coexisting Mediterranean shrubs (Pistacia lentiscus L. and Phillyrea latifolia L., evergreen schlerophylls, and Cistus incanus L., semi-deciduous) aiming at detecting the main adaptive differences, on a seasonal and daily basis, in primary and secondary metabolism along with the principal climatic determinants. These species differed in their physiological and biochemical responses especially on a seasonal level. In P. latifolia, a great investment in antioxidant phenylpropanoids contributed to maintain high photosynthetic rates throughout the whole growing season. In C. incanus, high carotenoid content associated with chlorophyll (Chl) regulation alleviated oxidative damage during the hot and dry summers and help recover photosynthesis in autumn. In P. lentiscus, high abscisic acid levels allowed a strict control of stomata, while fine Chla/Chlb regulation concurred to avoid photoinhibition in summer. Temperature resulted the most important climatic factor controlling the physiological and biochemical status of these coexisting shrubs and, thus, in determining plant performances in this Mediterranean coastal habitat.

Salicylic acid and formation of plant adaptive responses to abiotic stressors: role of signaling network components

2021 ◽  
pp. 135-165
Author(s):  
Yuriy E. Kolupaev ◽  
◽  
Tetiana O. Yastreb ◽  
Aleksey K. Polyakov ◽  
Alexander P. Dmitriev ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Signaling Network ◽  
Adaptive Responses ◽  
Abiotic Stressors

Synergistic and additive effects of drought stress and simulated herbivory on two goldenrods, Solidago altissima and S. gigantea

Botany ◽  
2016 ◽  
Vol 94 (8) ◽  
pp. 635-642 ◽  
Author(s):  
Zoryana Shibel ◽  
Stephen B. Heard
Keyword(s):  
Drought Stress ◽  
Abiotic Stresses ◽  
Synergistic Effects ◽  
Synergistic Action ◽  
Combined Effects ◽  
Additive Effects ◽  
Solidago Altissima ◽  
Simulated Herbivory ◽  
Combined Stresses ◽  
Effects Of Drought

Understanding the combined effects of stressors on plants is important for understanding how they will tolerate herbivory and other damage under unfavorable conditions. When two stresses have synergistic effects, plants may experience particularly strong impacts. We examined individual and combined effects of drought stress and clipping (simulated herbivory) on two species of goldenrods (Solidago altissima L. and S. gigantea Ait.). Each stress reduced production of most plant structures, with drought stress having stronger impacts than clipping. The effects of the two stresses were additive for S. gigantea but synergistic for S. altissima, at least for aboveground biomass and inflorescence biomass. Both species, when under stress, reallocated resources toward asexual reproduction (rhizomes) and away from sexual reproduction (inflorescences). Our results suggest that even closely related plants may tolerate damage differently when under abiotic stresses, and that predicting the additive vs. synergistic action of combined stresses will be difficult.

Effects of drought on photosynthesis in grapevines under field conditions: an evaluation of stomatal and mesophyll limitations

2002 ◽  
Vol 29 (4) ◽  
pp. 461 ◽  
Author(s):  
Jaume Flexas ◽  
Josefina Bota ◽  
José M. Escalona ◽  
Bartolomé Sampol ◽  
Hipólito Medrano
Keyword(s):  
Chlorophyll Fluorescence ◽  
Electron Transport Rate ◽  
Net Photosynthesis ◽  
Co2 Concentration ◽  
Vitis Vinifera L ◽  
Severe Drought ◽  
Mesophyll Conductance ◽  
Progressive Decline ◽  
Effects Of Drought ◽  
Combined Measurements

The effect of diffusional and photochemical limitations to photosynthesis was assessed in field-grown water-stressed grapevines (Vitis vinifera L.) by combined measurements of gas exchange and chlorophyll fluorescence. Drought was slowly induced, and the progressive decline of photosynthesis was examined in different grapevine cultivars along a continuous gradient of maximum mid-morning values of stomatal conductance (g), which were used as an integrative indicator of the water-stress conditions endured by the leaves. Initial decreases of g were accompanied by decreases of substomatal CO2 concentration (Ci), the estimated chloroplastic CO2 concentration (Cc) and net photosynthesis (AN), while electron transport rate (ETR) remained unaffected. With increasing drought, g, AN, Ci and Cc further decreased, accompanied by slight decreases of ETR and of the estimated mesophyll conductance (gmes). Severe drought led to strong reductions of both g and gmes, as well as of ETR. The apparent carboxylation efficiency and the compensation point for CO2 remained unchanged under severe drought when analysed on a Cc, rather than a Ci, basis, suggesting that previously reported metabolic impairment was probably due to decreased gmes.

Effects of drought stress on growth, physiological and biochemical parameters in fine roots of Quercus variabilis Bl. seedlings

2014 ◽  
Vol 34 (15) ◽  
Author(s):  
吴敏 WU Min ◽  
张文辉 ZHANG Wenhui ◽  
周建云 ZHOU Jianyun ◽  
马闯 MA Chuang ◽  
韩文娟 Han Wenjuan
Keyword(s):  
Drought Stress ◽  
Fine Roots ◽  
Biochemical Parameters ◽  
Quercus Variabilis ◽  
Effects Of Drought ◽  
Physiological And Biochemical

Characterization of Spanish grapevine cultivar diversity using sequence-tagged microsatellite site markers

Genome ◽  
2003 ◽  
Vol 46 (1) ◽  
pp. 10-18 ◽  
Author(s):  
J P Martín ◽  
J Borrego ◽  
F Cabello ◽  
J M Ortiz
Keyword(s):  
Plant Material ◽  
Vitis Vinifera L ◽  
Germplasm Bank ◽  
Discrimination Power ◽  
Grapevine Cultivar ◽  
Genotype Identification ◽  
Site Markers ◽  
Expected Values ◽  
Cultivar Diversity

A broad germplasm bank collection containing most of the autochthonous Spanish grapevine cultivars was analyzed using six sequence-tagged microsatellite site (STMS) loci: VVS2, VVMD5, VVMD7, ssrVrZAG47, ssrVrZAG62, and ssrVrZAG79. The number of alleles obtained ranged from 9 in ssrVrZAG47 to 13 in VVS2, and the observed genotypes per locus varied between 24 (ssrVrZAG47) and 41 (VVSS2). A total of 57 unique genotypes were obtained considering all 6 loci, and 40 varieties presented at least 1 of these specific genotypes. The genotypic combinations for the 6 loci have generated 163 different profiles in the 176 cultivars. Ten pairs of accessions and one group of four Garnacha's cultivars can not be differentiated. The observed heterozygosity varied between 75.6 (VVMD7) and 90.9% (VVMD5), without significant differences from the expected values for any loci. The VVMD5 locus was the most informative, and also showed the highest discrimination power. The cumulative discrimination power for all six loci was practically 1; however, in fact, these STMS loci have differentiated only about 93% of the accessions, probably owing to high relatedness of the plant material. Usefulness of this STMS set for characterization of a Spanish grapevine collection is emphasized, as well as the elaboration of databases with these molecular markers.Key words: Vitis vinifera L., STMS markers, genotype identification, grapevine synonymies, germplasm bank.

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