scholarly journals Short-term physiological responses to drought stress in seedling of tropical and temperate maize (Zea mays L.) cultivars

2019 ◽  
Vol 92 (1) ◽  
Author(s):  
Pu Zhao ◽  
Jin Wang ◽  
Niran Juntawong ◽  
Chokechai Aekatasanawan ◽  
Prasart Kermanee ◽  
...  
Keyword(s):  
Zea Mays ◽  
Drought Stress ◽  
Drought Resistance ◽  
Zea Mays L ◽  
Physiological Responses ◽  
Physiological Parameter ◽  
Tropical Maize ◽  
Gas Exchange Parameters ◽  
Maize Hybrids ◽  
Antioxidase Activity

Understanding of the response of tropical and temperate maize (Zea mays L.) to drought is the first step for tolerant temperate maize improvement. Eight maize hybrids were used to investigate physiology responses under drought stress, four of them were tropical maize and the others were temperate maize. Results showed that there were different drought tolerances but similar trends in both tropical maize and temperate maize. Gas exchange parameters revealed different strategies of maize under the stress. In our study, most of the temperate hybrids maintained open stomata to keep a higher photosynthesis rate at the beginning of stress, while the other hybrids decreased stomatal conductance. Compared to temperate maize, the tropical maize had higher antioxidase activity and greater physiological parameter variation among hybrids. KS5731 and ZD309 had stronger drought resistance among tropical and temperate maize hybrids separately. Tolerant hybrids maintained active photosynthesis, have higher osmotic adjustment ability and antioxidase activities but lower malonaldehyde content than the sensitive ones. Our results led to a better understanding of the physiological responses of tropical and temperate maize plants to drought stress and may provide an insight of breeding for drought resistance in maize.

scholarly journals Physiological Responses of Contrasting Maize (Zea mays L.) Hybrids to Repeated Drought

2021 ◽  
Author(s):  
Markus Kränzlein ◽  
Christoph-Martin Geilfus ◽  
Bastian L. Franzisky ◽  
Xudong Zhang ◽  
Monika A. Wimmer ◽  
...  
Keyword(s):  
Drought Stress ◽  
Water Content ◽  
Biomass Production ◽  
Drought Resistance ◽  
Physiological Responses ◽  
Leaf Water Content ◽  
Severe Drought ◽  
Maize Hybrids ◽  
Recovery Potential ◽  
Water Pulse

AbstractMaize is the most important crop worldwide in terms of production and yield, but every year a considerable amount of yield is lost due to drought. The foreseen increase in the number of drought spells due to climate change raises the question whether the ability to recover quickly after a water pulse may be a relevant trait for overall drought resistance. We here address the following hypotheses: (i) different maize hybrids exhibit distinct physiological adaptive responses to drought stress and (ii) these responses affect the ability to recover from the stress. (iii) The relative biomass production of maize hybrids, which show severe drought symptoms but are able to recover quickly after a water pulse, is comparable to those hybrids, which invest more energy into tolerance mechanisms. The physiological responses of eight maize hybrids to repeated drought were elucidated employing physiological parameters such as electrolyte leakage, osmolality, relative water content, growth rate and gas-exchange measurements. Only one hybrid was able to maintain biomass production under drought conditions. Amongst the others, two hybrids with similar growth inhibition but contrasting physiological responses were identified by a PCA analysis. Both strategies, i.e. stabilization of leaf water content via resistance mechanisms versus high recovery potential were equally effective in maintaining aboveground biomass production in the scenario of a long drought intermitted by a water-pulse. However, each strategy might be advantageous under different drought stress scenarios. Overall, the recovery potential is underestimated in drought resistance under natural conditions, which includes periodic cycles of drought and rewatering, and should be considered in screening trials.

Wood biochar produces different rates of root growth and transpiration in two maize hybrids (Zea mays L.) under drought stress

2018 ◽  
Vol 65 (6) ◽  
pp. 846-866 ◽  
Author(s):  
Leila Romdhane ◽  
Yasser Mahmoud Awad ◽  
Leila Radhouane ◽  
Cristian Dal Cortivo ◽  
Giuseppe Barion ◽  
...  
Keyword(s):  
Zea Mays ◽  
Drought Stress ◽  
Root Growth ◽  
Zea Mays L ◽  
Maize Hybrids

scholarly journals Genomic Regions Associated with Root Traits under Drought Stress in Tropical Maize (Zea mays L.)

PLoS ONE ◽  
2016 ◽  
Vol 11 (10) ◽  
pp. e0164340 ◽  
Author(s):  
P. H. Zaidi ◽  
K. Seetharam ◽  
Girish Krishna ◽  
L. Krishnamurthy ◽  
S. Gajanan ◽  
...  
Keyword(s):  
Zea Mays ◽  
Drought Stress ◽  
Zea Mays L ◽  
Root Traits ◽  
Tropical Maize ◽  
Genomic Regions

scholarly journals Selection approaches to the variation of responses to soil compaction stress among maize hybrids ( Zea mays L.)

2021 ◽  
Author(s):  
Maciej T. Grzesiak ◽  
Anna Maksymowicz ◽  
Barbara Jurczyk ◽  
Tomasz Hura ◽  
Grzegorz Rut ◽  
...  
Keyword(s):  
Zea Mays ◽  
Soil Compaction ◽  
Zea Mays L ◽  
Maize Hybrids ◽  
Compaction Stress
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