Physiological responses of three maize cultivars to drought stress and recovery.

By B. Efeoğlu, Y. Ekmekçi, N. Çiçek. 2009

356 citations recorded by the source corpus.

Abstract Water shortages and soil water losses due to environmental change and land use change are challenges to maize production. An experiment was conducted to investigate the physiological responses of the maize ( Zea mays L.) cultivars Doge, Vero and Luce to drought conditions. Drought stress was imposed on the plants 12 days after sowing by withholding irrigation for 12 days and then rewatering for 6 days. Growth of all cultivars was retarded under drought stress conditions and regained speed during the recovery stage. RWC decreased in all cultivars by drought and reached the control values during the recovery period. Fresh and dry biomass of the cultivars significantly decreased in all cultivars. Drought affected the minimum fluorescence ( F o ) of all cultivars, but a significant effect was only found in Doge. Drought also caused decreases in F M , F V / F M , F V ′/ F M ′, ϕ PSII and q L ; and an increase of non-photochemical quenching ( NPQ ) , but those returned to control values during the recovery stage in all three cultivars. Chlorophyll (chl) a , chl b , total chl ( a + b ) and carotenoid contents of all maize cultivars were significantly reduced under drought, but a recovery was observed following rewatering. Anthocyanin and proline contents increased in all cultivars. Although Doge was affected from drought more than the other cultivars, it could probably withstand drought with better upregulating its protective mechanisms. As a result of that Doge was classified as less drought tolerant, but others as tolerant.

Subfields: Plant Science

View Paper: https://www.semanticscholar.org/paper/90c57daec662c94ad0e78a7b8a48561e3e6066f0

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Citations in the corpus

Photosynthesis under stressful environments: An overview (2013, background): “Plants have evolved a variety of protective mechanisms against the ROSinduced damage to cellular components, such as the dissipation of excess excitation energy and the synthesis of protective pigments, such as Car and anthocyanins (Efeoglu et al. 2009, Huang et al. 2010).”
Influence of drought stress on photosynthetic characteristics and protective enzymes of potato at seedling stage (2017, background): “Studies (Efeoglu et al., 2009) indicated that drought is an important factor responsible for the inhibited growth of plants and reduced photosynthesis.”
Physiological responses of Brassica napus to fulvic acid under water stress: Chlorophyll a fluorescence and antioxidant enzyme activity (2015, background): “Water stress also reduces photosynthetic efficiency or increases the dissipation of excess excitation energy as heat, and these effects may lead to changes in fluorescence parameters [3].”