The effect of drought stress on yield, leaf gaseous exchange and chlorophyll fluorescence of dry beans (Phaseolus vulgaris L.)

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dc.contributor.author Mathobo, Rudzani
dc.contributor.author Marais, D. (Diana)
dc.contributor.author Steyn, J.M. (Joachim Marthinus), 1963-
dc.date.accessioned 2017-02-09T07:28:38Z
dc.date.issued 2017-01
dc.description.abstract Global food production relies on irrigation, especially in low rainfall areas such as South Africa. The study was conducted to determine the effect of drought stress on growth, yield, leaf gaseous exchange and chlorophyll fluorescence parameters of dry bean under field conditions and the after effects of drought stress upon lifting drought stress. A rain shelter field trial was conducted at the Hatfield Experimental Farm of the University of Pretoria, Pretoria, South Africa. Dry bean cultivar DBS 360 was subjected to five levels of moisture stress arranged in a randomized complete block design with six replications. The plants were exposed to the following drought stress levels: the control: Irrigated to field capacity (S1), Withholding irrigation from 36 days after planting (DAP) for 24 days (S2), Withholding irrigation from 49 DAP for 24 days (S3), Withholding irrigation from 73 DAP to the end of the growing season (S4) and irrigated to field capacity on a fortnightly bases for the rest of the season from 36 DAP to the end of the growing season (S5).The results revealed that drought stress reduced dry matter production, leaf area index, number of pods per plant, number of seeds per plant, hundred seed weight and grain yield. Treatments S1, S4 and S5 produced statistically similar grain yield. Drought stress towards the end of the growing season may not cause serious harm in grain yield. Drought stress resulted in a reduction in photosynthetic rate, intercellular carbon dioxide concentration, stomatal conductance and transpiration. Chlorophyll fluorescence was also affected by drought stress. The highest WUE was found in the treatment which was irrigated on fortnightly bases from 36 DAP. This indicates that with appropriate irrigation it is possible to save water without a great yield loss in dry bean. en_ZA
dc.description.department Plant Production and Soil Science en_ZA
dc.description.embargo 2018-01-31
dc.description.librarian hb2017 en_ZA
dc.description.uri http://www.elsevier.com/locate/agwat en_ZA
dc.identifier.citation Mathobo, R, Marais, D & Steyn, JM 2017, 'The effect of drought stress on yield, leaf gaseous exchange and chlorophyll fluorescence of dry beans (Phaseolus vulgaris L.)', Agricultural Water Management, vol. 180, Part A, pp. 118-125. en_ZA
dc.identifier.issn 0378-3774 (print)
dc.identifier.issn 1873-2283 (online)
dc.identifier.other 10.1016/j.agwat.2016.11.005
dc.identifier.uri http://hdl.handle.net/2263/58940
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2016 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Agricultural Water Management. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. A definitive version was subsequently published in Agricultural Water Management, vol. 180, pp. 118-125, 2017. doi : 10.1016/j.agwat.2016.11.005. en_ZA
dc.subject Moisture stress en_ZA
dc.subject Photosynthesis en_ZA
dc.subject Water stress en_ZA
dc.subject Water use efficiency en_ZA
dc.subject Drought stress en_ZA
dc.subject Growth en_ZA
dc.subject Yield en_ZA
dc.subject Leaf gaseous exchange en_ZA
dc.subject Chlorophyll fluorescence parameters en_ZA
dc.subject Dry bean en_ZA
dc.title The effect of drought stress on yield, leaf gaseous exchange and chlorophyll fluorescence of dry beans (Phaseolus vulgaris L.) en_ZA
dc.type Postprint Article en_ZA


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