scholarly journals Effects of drought stress and water recovery on physiological responses and gene expression in maize seedlings

2018 ◽  
Vol 18 (1) ◽  
Author(s):  
Xiangbo Zhang ◽  
Lei Lei ◽  
Jinsheng Lai ◽  
Haiming Zhao ◽  
Weibin Song
Keyword(s):  
Gene Expression ◽  
Drought Stress ◽  
Physiological Responses ◽  
Water Recovery ◽  
Maize Seedlings ◽  
Effects Of Drought

scholarly journals Effects of Drought and Rehydration on the Physiological Responses of Artemisia halodendron

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 793
Author(s):  
Juanli Chen ◽  
Xueyong Zhao ◽  
Yaqiu Zhang ◽  
Yuqiang Li ◽  
Yongqing Luo ◽  
...  
Keyword(s):  
Chlorophyll Fluorescence ◽  
Drought Stress ◽  
Membrane Permeability ◽  
Chlorophyll Content ◽  
Physiological Responses ◽  
Severe Drought ◽  
Native Plant ◽  
Chlorophyll Fluorescence Parameters ◽  
Artemisia Halodendron ◽  
Effects Of Drought

Artemisia halodendron is a widely distributed native plant in China’s Horqin sandy land, but few studies have examined its physiological responses to drought and rehydration. To provide more information, we investigated the effects of drought and rehydration on the chlorophyll fluorescence parameters and physiological responses of A. halodendron to reveal the mechanisms responsible for A. halodendron’s tolerance of drought stress and the resulting ability to tolerate drought. We found that A. halodendron had strong drought resistance. Its chlorophyll content first increased and then decreased with prolonged drought. Variable chlorophyll fluorescence (Fv) and quantum efficiency of photosystem II (Fv/Fm) decreased, and the membrane permeability and malondialdehyde increased. When plants were subjected to drought stress, superoxide dismutase (SOD) activity degraded under severe drought, but the activities of peroxidase (POD) and catalase (CAT) and the contents of soluble proteins, soluble sugars, and free proline increased. Severe drought caused wilting of A. halodendron leaves and the leaves failed to recover even after rehydration. After rehydration, the chlorophyll content, membrane permeability, SOD and CAT activities, and the contents of the three osmoregulatory substances under moderate drought began to recover. However, Fv, Fv/Fm, malondialdehyde, and POD activity did not recover under severe drought. These results illustrated that drought tolerance of A. halodendron resulted from increased enzyme (POD and CAT) activities and accumulation of osmoregulatory substances.

Effects of drought stress on the water relations in Brassica species

1993 ◽  
Vol 73 (2) ◽  
pp. 525-529 ◽  
Author(s):  
Allen G. Good ◽  
James L. Maclagan
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Osmotic Potential ◽  
Relative Water Content ◽  
Physiological Responses ◽  
Brassica Species ◽  
Leaf Osmotic Potential ◽  
Drought Conditions ◽  
Relative Water ◽  
Effects Of Drought

The physiological responses of different species of Brassica to induced drought stress were studied by analysing the relationships between relative water content, leaf water potential and leaf osmotic potential during the onset of drought stress. These data indicate that while there was a decrease in leaf osmotic potential with the onset of drought stress, this did not result from a net increase in solutes. Therefore, these genotypes of Brassica do not appear able to osmoregulate under these drought conditions. Key words: Brassica, drought, osmoregulation, water stress

scholarly journals Physiological responses to lead and PEG-simulated drought stress in metallicolous and non-metallicolous Matthiola (Brassicaceae) species from Iran

2021 ◽  
Author(s):  
Behrooz Salehi-Eskandari ◽  
Mina Shahbazi Gahrouei ◽  
Robert S. Boyd ◽  
Nishanta Rajakaruna ◽  
Rasoul Ghasemi
Keyword(s):  
Drought Stress ◽  
Reducing Sugars ◽  
Physiological Responses ◽  
Toxic Effects ◽  
Brassicaceae Species ◽  
Pb Accumulation ◽  
Simulated Drought ◽  
Effects Of Drought ◽  
And Oxidative Stress

Abstract Aims Plants growing on quarry tailings at the Irankouh Pb/Zn mine encounter both drought stress and high levels of Pb. To better understand role of drought and Pb in plant adaptation to Pb/Zn quarry tailings, we compared effects of drought stress (simulated by polyethylene glycol - PEG) and Pb, individually and in concert, to determine how these stressors affected two plant species: the metallicolous species Matthiola flavida and the non-metallicolous M. incana. Methods Plants were exposed to Pb (Pb(NO3)2) and three levels of PEG (0, -0.5, and − 0.75 MPa) in a complete factorial design. Results Lead had non-significant effects on growth and oxidative stress but enhanced levels of osmoprotectants and phenol compounds in the metallicolous M. flavida, whereas in the non-metallicolous M. incana Pb had non-significant or toxic effects on the same variables (except for the osmoprotectants proline and glycine betaine, and anthocyanins). In contrast to M. incana, the metallicolous species was hypertolerant of Pb, showing strongly reduced root-to-shoot translocation and enhanced Pb accumulation in the root, especially when under drought stress. Conclusion We conclude that enhanced Pb accumulation in the root and reduced translocation to the shoot, particularly when under high PEG exposure in the metallicolous species, reduced toxic effects of Pb in the shoot. This was aided by the accumulation of reducing sugars and phenolic compounds as well as greater catalase activity.

Gene Expression and Physiological Responses in Mexican Maize Landraces under Drought Stress and Recovery Irrigation

2011 ◽  
pp. 74-103
Author(s):  
Corina Hayano-Kanashiro ◽  
Carlos Calderón-Vázquez ◽  
Enrique Ibarra-Laclette ◽  
Luis Herrera-Estrella ◽  
June Simpson
Keyword(s):  
Gene Expression ◽  
Drought Stress ◽  
Physiological Responses ◽  
Maize Landraces ◽  
Mexican Maize

scholarly journals The effects of drought stress on leaf gene expression during flowering in blackcurrant (Ribes nigrum L.)

2015 ◽  
Vol 80 (1) ◽  
pp. 39-46 ◽  
Author(s):  
N. Čereković ◽  
◽  
D. Jarret ◽  
M. Pagter ◽  
D.W. Cullen ◽  
...  
Keyword(s):  
Gene Expression ◽  
Drought Stress ◽  
Ribes Nigrum ◽  
Effects Of Drought

scholarly journals Analysis of Gene Expression and Physiological Responses in Three Mexican Maize Landraces under Drought Stress and Recovery Irrigation

PLoS ONE ◽  
2009 ◽  
Vol 4 (10) ◽  
pp. e7531 ◽  
Author(s):  
Corina Hayano-Kanashiro ◽  
Carlos Calderón-Vázquez ◽  
Enrique Ibarra-Laclette ◽  
Luis Herrera-Estrella ◽  
June Simpson
Keyword(s):  
Gene Expression ◽  
Drought Stress ◽  
Physiological Responses ◽  
Maize Landraces ◽  
Mexican Maize

scholarly journals Morphological, physiological and molecular responses of Indonesian cassava to drought stress

2020 ◽  
pp. 1723-1727
Author(s):  
Sholeh Avivi ◽  
Bella Rhea Lavifa Sanjaya ◽  
Shinjiro Ogita ◽  
Sri Hartatik ◽  
Sigit Soeparjono
Keyword(s):  
Gene Expression ◽  
Hydrogen Peroxide ◽  
Drought Stress ◽  
Physiological Responses ◽  
Plant Cells ◽  
Gene Expressions ◽  
Molecular Responses ◽  
Molecular Features ◽  
Drought Tolerant ◽  
Cassava Varieties

In Indonesia, investigations of drought-tolerant cassava by characterizing the morphological, physiological, and molecular responses have not been carried out. This research was aimed to characterize the morphological, physiological, and molecular features of 10 Indonesian cassava varieties (Adira 1, Malang 1, Cimanggu, Kaspro, Ketan, Litbang UK-2, Malang 4, Malang 6, UJ-3, and UJ-5) under drought stress. 30 days after planting, drought stress was applied by stopping irrigation of plants for 15 days. The plant height, root system, and wilting were measured as morphological responses of cassava. For physiological responses, the percentage of opening stomata, chlorophyll, and hydrogen peroxide (H2O2) content were also investigated. Gene expression of MeGBF3 and MeMSD was evaluated to analyze the response of candidate drought-tolerant genotypes. The studied parameters revealed that drought stress inhibits the growth of cassava. Some genotypes could not survive because the excessive content of H2O2 would be toxic to plant cells and disturb the plant growth. The up-regulated gene expressions of MeGBF3 and MeMSD has correlations with morphological and physiological responses of cassava to drought stress. Adira 1 and Kaspro are thought as drought-tolerant genotypes due to the morphological, physiological, and molecular responses.

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