Agronomy Journal · 1969 · 29 citations · 0 references
AgricultureAgronomyPlant SciencesCrop PhysiologyField PhenotypingPlant PhysiologyAbiotic Stress EvaluationDrought Stress PhysiologyDrought ToleranceLeaf MorphologyPhenotyping For Abiotic Stress ToleranceStress PhenotypingChlorophyll StabilityCrop Response To Water DeficitDrought StressDrought Stress EffectsDrought Tolerance PhenotypingPlant Drought ToleranceResistance To DroughtTiller Counting
Abstract Twelve dent and sweet corn lines exhibiting a range of phenotypic response to field drought were exposed to 1) a heat and atmospheric‐drought test of seedlings, 2) a test for chlorophyll stability of leaf tissue, and 3) conduction inhibition test of excised leaves. At two locations during 2 years in the field, lines were rated for leaf firing and measured for leaf blade area, tiller number, plant height, leaf number, stomatal number, and stem vascular bundle number. Results were positively and highly correlated among the three objective tests and for each test with leaf firing in the field. Plant height, but not other morphological measurements, was negatively and significantly correlated with test results and with leaf firing in the field.