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Main conclusion During maize somatic embryogenesis, suppression of phytoglobins (Pgbs) reduced ABA levels leading to ethylene-induced programmed cell death in the developing embryos. These effects modulate embryonic yield depending on the cellular localization of specific phytoglobin gene expression.Suppression of Zea mays phytoglobins (ZmPgb1.1 or ZmPgb1.2) during somatic embryogenesis induces programmed...
The formation of ethylene under different O 2 concentrations and upon addition of nitric oxide (NO) donor, sodium nitroprusside (SNP), was determined using maize (Zea mays L.) cell lines over-expressing (Hb+) or down-regulating (Hb–) hypoxically inducible (class-1) hemoglobin (Hb). Under all treatments, ethylene levels in the Hb– line were 5 to 6.5 times the levels in Hb+ and four to five...
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