4269600
doi
10.5281/zenodo.4269600
oai:zenodo.org:4269600
user-eu
user-h2020-magic
Alexopoulou, Efthymia
Papadopoulos, George K.
Economou-Antonaka, Garifalia
Tolerance to Drought and Water Stress Resistance Mechanism of Castor Bean
Papazoglou, Eleni G.
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
Ricinus communis L.
water scarcity
leaf water potential
stomatal resistance
leaf area
growth parameters
<p>Castor bean (Ricinus communis L.) is a multipurpose crop; its oil has numerous applications worldwide and the last decade demonstrated a growing international demand. The aim of this work was to investigate the level of castor bean tolerance to drought and its possession of a water stress resistance mechanism by applying three different water regimes in a glasshouse pot experiment conducted for two years. The treatments applied were 70% (T<sub>70</sub>-control), 55% (T<sub>55</sub>) and 40% (T<sub>40</sub>) of the available soil moisture. The results showed that the growth parameters height, trunk diameter, and fresh and dry weights of leaves and stems were not affected by the moderate water scarcity (T<sub>55</sub>), while they were significantly decreased by T<sub>40</sub>. Significant decrease in leaf number was observed in both T<sub>55 </sub>(17%) and T<sub>40</sub> (27%) plants, with a delay of 4 weeks in the lower treated plants. Leaf area was decreased by 54% and 20% in T<sub>55</sub> and T<sub>40</sub> respectively, indicating that its reduction was mainly due to a reduction of leaf size than of leaf number. The leaf water potential was increased negatively with increasing stress, showing a water loss and decrease of turgidity in cells. Stomatal resistance was significantly higher at the higher water scarcity and this response indicates a water stress resistance mechanism. This result was also confirmed by the regression analysis performed between stomatal resistance and leaf water potential. In conclusion, castor bean showed a tolerance ability under water stress conditions and its early physiological reaction allows its acclimatization to drought conditions.</p>
Zenodo
2020-09-10
info:eu-repo/semantics/article
4269599
user-eu
user-h2020-magic
award_title=Marginal lands for Growing Industrial Crops: Turning a burden into an opportunity; award_number=727698; award_identifiers_scheme=url; award_identifiers_identifier=https://cordis.europa.eu/projects/727698; funder_id=00k4n6c32; funder_name=European Commission;
1639641777.512287
1623528
md5:2df7286d814998582d8905cd143fb1a5
https://zenodo.org/records/4269600/files/2-agronomy-10-01580.pdf
public
10.5281/zenodo.4269599
isVersionOf
doi
agronomy
2020
10
1580
2020-09-10