The singular and combined effects of drought and copper stresses on the morphological traits, photosynthetic pigments, essential oils yield and copper concentration of Fumaria parviflora Lam.

Present investigation was focused on the response and regulation of the antioxidant defense system and photosynthetic pigment variation effect of two important fungicides or plant growth regulators Hexaconazole (HEX) and Tebuconazole (TBZ) on drought stressed tomato (Lycopersicon esculentum Mill.) plants. Drought stress was imposed for 30 Days after sowing (DAS) of tomato plant. The water was irrigated by 4 Days Interval Drought (DID) and the control plants were regularly irrigated. Triazole treatment like HEX at 15 mg L-1 and TBZ at 10 mg L-1 imposed on 30, 40 and 50 DAS. The plant samples were collected on 40, 50 and 60 DAS. The photosynthetic pigments like chlorophyll – a, chlorophyll – b and total chlorophyll were estimated. The drought stress reduced the photosynthetic pigments and increased the antioxidant contents and antioxidant enzymes activities. The combined drought stress with triazole treatments increased the photosynthetic pigments then reduced the ascorbic acid (AA), α-tocopherol, catalase (CAT), peroxidase (POX) and superoxide dismutase (SOD) activities, when compared to drought stressed plants. It can be concluded that the triazole treatment partially mitigated the adverse effects of drought stress in L. esculentum.

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Combined Effects of Drought and Density on Body and Antler Size of Male Iberian Red DeerCervus Elaphus Hispanicus: Climate Change Implications

Wildlife Biology ◽

10.2981/08-059 ◽

2009 ◽

Vol 15 (2) ◽

pp. 213-221 ◽

Cited By ~ 10

Author(s):

Jerónimo Torres-Porras ◽

Juan Carranza ◽

Javier Pérez-González

Keyword(s):

Climate Change ◽

Combined Effects ◽

Antler Size ◽

Effects Of Drought

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

Botany ◽

10.1139/cjb-2016-0060 ◽

2016 ◽

Vol 94 (8) ◽

pp. 635-642 ◽

Cited By ~ 3

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.

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Combined effects of drought stress and psyllid herbivory on the invasive weed Scotch broom, Cytisus scoparius

Entomologia Experimentalis et Applicata ◽

10.1111/eea.12880 ◽

2020 ◽

Vol 168 (3) ◽

pp. 209-220

Author(s):

Brian N. Hogg ◽

Patrick J. Moran

Keyword(s):

Drought Stress ◽

Combined Effects ◽

Cytisus Scoparius ◽

Invasive Weed ◽

Scotch Broom ◽

Effects Of Drought

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Effects of the Urea and Heavy Metals (Ni2+ and Cu2+) Higher Concentrations on Aquatic Macrophytes (Egeria densa Planch. as a Study Case)

Water sector of Russia: problems, technologies, management - Методы оценки и механизмы регулирования водопользования в современных условиях ◽

10.35567/1999-4508-2015-1-5 ◽

2015 ◽

pp. 55-63

Author(s):

Keyword(s):

Oxidative Stress ◽

Heavy Metals ◽

Photosynthetic Pigments ◽

Aquatic Macrophytes ◽

Copper Concentration ◽

Aquatic Macrophyte ◽

Egeria Densa ◽

Water Weed ◽

Study Case ◽

Nickel Lead

Urea and heavy metals (Ni2+ and Cu2+) higher concentration infl uence on the photosynthetic pigments’ content, lipids peroxidation intensity and urease ferments activity in the submerged aquatic macrophyte – Egeria densa Planch. have been studied. It has been shown that addition of metals to the medium with urea tends to strengthen its toxic effect upon plants. It has been found that four-day long hatching of plants in the medium with urea and nickel lead to the oxidative stress development in Canada water weed leaves. Copper concentration equal to 100 mkmol/l appeared to be lethal for plants.

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Systematics Evaluations of Morphological Traits, Chemical Composition, and Antimicrobial Properties of Selected Varieties of Elettaria cardamomum (L.) Maton

Natural Product Communications ◽

10.1177/1934578x19892688 ◽

2019 ◽

Vol 14 (12) ◽

pp. 1934578X1989268

Author(s):

Aftab Alam ◽

Rita Singh Majumdar ◽

Pravej Alam

Keyword(s):

Escherichia Coli ◽

Essential Oils ◽

Morphological Traits ◽

Morphological Character ◽

Antimicrobial Properties ◽

Antimicrobial Activities ◽

Major Constituent ◽

Chemical Compositions ◽

Elettaria Cardamomum ◽

Maximum Inhibition

Elettaria cardamomum is cultivated in the Southern part of India showed great extinct of differences in their morphotypes and chemical compositions. In the present study, we have selected three varieties of Elettaria cardamomum “Valley Green, Palakuzhi, and ICRI”, to analyze the morphological perturbations, chemical compositions, and antimicrobial activities. The differences in the morphological character of cardamom varieties (Valley Green, Palakuzhi, and ICRI) were carried out on the basis of panicles, capsules shape, plant height, tiller, and seeds per capsule. The GC-MS analysis of the essential oils resulted in the identification of 27, 29, 30 compounds representing over 97.4%, 95.2%, and 98.8% of the Valley Green (VG), Palakuzhi (PAL), and ICRI fruit oils respectively. Monoterpene, α-terpinyl acetate varied from 35.4 to 47.5%, a major constituent while 1,8-cineole (22.8% to 27.4%) observed the second major compounds revealed in oils of these cultivars. Further, the antimicrobial activities of each essential oils were performed against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Klebsiella pneumoniae, Candida albicans, and Aspergillus niger. The maximum inhibition percentage against the microbes was observed in Valley Green essential oil as compared to oils of other varieties.

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