Endogenous Hormones Inhibit Differentiation of Young Ears in Maize (<i>Zea mays L.</i>) Under Heat Stress.

As shown in Table 1 , the length of the young ear, the length of the undeveloped part at the top of the ear, the ear diameter and the grain abortion rate exhibited extremely significant differences between varieties, temperatures, stages during which heat stress occurred, and the interactions between various factors.

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In contrast, the content of SA in the heat-sensitive maize variety showed a decreasing trend after heat stress, and the largest decrease, which was 83.69% below the control group, occurred after applying heat stress during the V12 stage.

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