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Effect of irrigation on the relationships between leaf gas exchange related traits and yield in dwarf dry bean grown under Mediterranean conditions

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  • Ninou, E.
  • Tsialtas, J.T.
  • Dordas, C.A.
  • Papakosta, D.K.

Abstract

Drought is a major yield constraint of crop productivity. Determining physiological traits involved in the response of common bean to drought stress could lead to improving drought tolerance. A two-year study (2008 and 2009) was carried out to determine the physiological traits that are associated with drought tolerance for maximum dry bean seed yield (SY), and water use efficiency (WUE) in northern Greece. Two cultivars (Borlotto and Green crop) were evaluated at five water levels based on crop evapotraspiration (ETm) (100% –I100, 75% –I75, 50% –I50, 25% –I25 and 0% –I0). Under higher irrigation regimes (I75, I100), higher seed yield (SY) was found due obviously to a denser canopy (higher LAI), with greener (higher SPAD), and more photosynthetically active leaves (higher net assimilation rate-A, transpiration rate-E and stomatal conductance-gs) compared with lower irrigation rates. In addition, under higher irrigation regimes (I75, I100), a higher partitioning of dry matter to seeds (higher HI) was evident. Instantaneous water use efficiency (A/E) increased with increasing irrigation levels. On contrary to negative correlations in C3 species, carbon isotope discrimination (Δ) was positively correlated to A/E doubting its reliability as a long-term assessment of water use efficiency in bean. However, Δ was strongly correlated with SY indicating that higher water availability contributed to higher yields. The early flowering cultivar (Borlotto) had higher SY compared with the late flowering one (Green crop), however, no significant difference was found at the physiological traits between the two cultivars. Leaf-to-air temperature difference (ΔT) showed to be a good threshold indicator of non-stress water conditions in bean during the post-filling period since a value higher than 2.95°C indicated a severe water stress.

Suggested Citation

  • Ninou, E. & Tsialtas, J.T. & Dordas, C.A. & Papakosta, D.K., 2013. "Effect of irrigation on the relationships between leaf gas exchange related traits and yield in dwarf dry bean grown under Mediterranean conditions," Agricultural Water Management, Elsevier, vol. 116(C), pages 235-241.
    • Handle: RePEc:eee:agiwat:v:116:y:2013:i:c:p:235-241
    DOI: 10.1016/j.agwat.2012.08.002
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    References listed on IDEAS

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    1. Köksal, Eyüp Selim & Kodal, Süleyman & Üstün, Haluk & Yildirim, Yusuf Ersoy, 2010. "Estimation of dwarf green bean water use under semi-arid climate conditions through ground-based remote sensing techniques," Agricultural Water Management, Elsevier, vol. 98(2), pages 353-360, December.
    2. Misra, S.C. & Shinde, S. & Geerts, S. & Rao, V.S. & Monneveux, P., 2010. "Can carbon isotope discrimination and ash content predict grain yield and water use efficiency in wheat?," Agricultural Water Management, Elsevier, vol. 97(1), pages 57-65, January.
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    1. Yonts, C. Dean & Haghverdi, Amir & Reichert, David L. & Irmak, Suat, 2018. "Deficit irrigation and surface residue cover effects on dry bean yield, in-season soil water content and irrigation water use efficiency in western Nebraska high plains," Agricultural Water Management, Elsevier, vol. 199(C), pages 138-147.

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