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Reactive oxygen species (ROS) and reactive nitrogen species (RNS) are emerging as important regulators of plant development (germination, flowering, senescence), acting as secondary messengers in cooperation with classical phytohormones. Apple seeds are dormant, unless they undergo a 3 month long cold stratification. Deep dormancy of isolated apple embryos can also be broken by short pre-treatment...
The connection between classical phytohormone-ethylene and two signaling molecules, nitric oxide (NO) and hydrogen cyanide (HCN), was investigated in dormancy removal and germination “sensu stricto” of apple (Malus domestica Borkh.) embryos. Deep dormancy of apple embryos was removed by short-term (3–6 h) pre-treatment with NO or HCN. NO- or HCN-mediated stimulation of germination was associated with...
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