Details
| Original language | English |
|---|---|
| Pages (from-to) | 490-507 |
| Number of pages | 18 |
| Journal | Journal of Agronomy and Crop Science |
| Volume | 205 |
| Issue number | 5 |
| Publication status | Published - 1 Oct 2019 |
Abstract
Balanites aegyptiaca is a drought-tolerant tree naturally distributed in Africa and has a high potential for biofuel production and livelihood. To understand the plant tolerance to drought stress, B. aegyptiaca plants collected from five provenances were subjected for 4 weeks to drought stress through different regimes of soil volumetric water content (VWC, i.e. 25% control, 15% as moderate and 5% as a severe drought stress) followed by 2-week recovery. Morpho-physiological responses as well as the changes in antioxidant defences under water stress and recovery were investigated. Drought stress significantly reduced plant biomass-related parameters, stomatal conductance, quantum efficiency and increased leaf temperature. Each provenance showed specific patterns of stress response reactions that were detected in a cluster analysis. The large leaf area and a high level of lipid peroxidation in Cairo provenance increased its sensitivity to severe drought. For provenances El-Kharga and Yemen, the highest tocopherol contents and the highest catalytic activities of ascorbate peroxidase (SOD), catalase (CAT), glutathione reductase (GR) and dehydroascorbate reductase (DHAR) were recorded. These traits contributed to the high drought tolerance of these two provenances in comparison with the other provenances. All plants recovered from stress and showed specifically increased activity of glutathione-S-transferase (GST) as a repair mechanism. Results showed that the drought tolerance level in B. aegyptiaca is provenance-dependent.
Keywords
- antioxidant enzymes, cluster analysis, growth parameters, recovery, stomatal conductance, thermal imaging, water deficit
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
- Agricultural and Biological Sciences(all)
- Plant Science
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In: Journal of Agronomy and Crop Science, Vol. 205, No. 5, 01.10.2019, p. 490-507.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Morphological and biochemical responses of Balanites aegyptiaca to drought stress and recovery are provenance-dependent
AU - Khamis, Galal
AU - Hamada, Abd Elgawad
AU - Schaarschmidt, Frank
AU - Beemster, Gerrit T.S.
AU - Asard, Han
AU - Papenbrock, Jutta
N1 - Funding information: We would like to thank the German Academic Exchange Service (DAAD) for providing the research support to Galal Khamis. Hamada AbdElgawad is supported by a postdoctoral fellowship from the Reserach Foundation Flanders (FWO, 12U8918N).
PY - 2019/10/1
Y1 - 2019/10/1
N2 - Balanites aegyptiaca is a drought-tolerant tree naturally distributed in Africa and has a high potential for biofuel production and livelihood. To understand the plant tolerance to drought stress, B. aegyptiaca plants collected from five provenances were subjected for 4 weeks to drought stress through different regimes of soil volumetric water content (VWC, i.e. 25% control, 15% as moderate and 5% as a severe drought stress) followed by 2-week recovery. Morpho-physiological responses as well as the changes in antioxidant defences under water stress and recovery were investigated. Drought stress significantly reduced plant biomass-related parameters, stomatal conductance, quantum efficiency and increased leaf temperature. Each provenance showed specific patterns of stress response reactions that were detected in a cluster analysis. The large leaf area and a high level of lipid peroxidation in Cairo provenance increased its sensitivity to severe drought. For provenances El-Kharga and Yemen, the highest tocopherol contents and the highest catalytic activities of ascorbate peroxidase (SOD), catalase (CAT), glutathione reductase (GR) and dehydroascorbate reductase (DHAR) were recorded. These traits contributed to the high drought tolerance of these two provenances in comparison with the other provenances. All plants recovered from stress and showed specifically increased activity of glutathione-S-transferase (GST) as a repair mechanism. Results showed that the drought tolerance level in B. aegyptiaca is provenance-dependent.
AB - Balanites aegyptiaca is a drought-tolerant tree naturally distributed in Africa and has a high potential for biofuel production and livelihood. To understand the plant tolerance to drought stress, B. aegyptiaca plants collected from five provenances were subjected for 4 weeks to drought stress through different regimes of soil volumetric water content (VWC, i.e. 25% control, 15% as moderate and 5% as a severe drought stress) followed by 2-week recovery. Morpho-physiological responses as well as the changes in antioxidant defences under water stress and recovery were investigated. Drought stress significantly reduced plant biomass-related parameters, stomatal conductance, quantum efficiency and increased leaf temperature. Each provenance showed specific patterns of stress response reactions that were detected in a cluster analysis. The large leaf area and a high level of lipid peroxidation in Cairo provenance increased its sensitivity to severe drought. For provenances El-Kharga and Yemen, the highest tocopherol contents and the highest catalytic activities of ascorbate peroxidase (SOD), catalase (CAT), glutathione reductase (GR) and dehydroascorbate reductase (DHAR) were recorded. These traits contributed to the high drought tolerance of these two provenances in comparison with the other provenances. All plants recovered from stress and showed specifically increased activity of glutathione-S-transferase (GST) as a repair mechanism. Results showed that the drought tolerance level in B. aegyptiaca is provenance-dependent.
KW - antioxidant enzymes
KW - cluster analysis
KW - growth parameters
KW - recovery
KW - stomatal conductance
KW - thermal imaging
KW - water deficit
UR - http://www.scopus.com/inward/record.url?scp=85065183199&partnerID=8YFLogxK
U2 - 10.1111/jac.12340
DO - 10.1111/jac.12340
M3 - Article
AN - SCOPUS:85065183199
VL - 205
SP - 490
EP - 507
JO - Journal of Agronomy and Crop Science
JF - Journal of Agronomy and Crop Science
SN - 0931-2250
IS - 5
ER -