Application | Comment | Organism |
---|---|---|
agriculture | application of boron at high concentrations (10 and 20 mM) to maize seeds or even application very near to the seeds is not advisable | Zea mays |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
boron | boron in an essential micronutrient required for growth and development of plants. Boron treatments: Germination of maize seeds is not effected by boron concentrations up to 10 mM but decreased by 20 mM boron. Excess boron lowers the PPO activity in seed tissues during germination of maize. Time course of PPO activities in embryo and endosperm of maize seeds treated with boron during and following germination is shown | Zea mays |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Zea mays | - |
cv. Arifiye | - |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
embryo | of maize seeds | Zea mays | - |
endosperm | of maize seeds | Zea mays | - |
seed | - |
Zea mays | - |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
additional information | - |
time course of PPO activities in embryo and endosperm of maize seeds treated with boron during and following germination is shown | Zea mays |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
caffeic acid + 1/2 O2 | - |
Zea mays | caffeoyl quinone + H2O | - |
? | |
catechol + 1/2 O2 | - |
Zea mays | 1,2-benzoquinone + H2O | - |
? | |
dopa + 1/2 O2 | - |
Zea mays | dopaquinone + H2O | - |
? | |
additional information | catalyse the hydroxylation of monophenols to o-dihydroxyphenols (E.C. 1.14.18.1), and the oxidation of o-dihydroxyphenols to o-quinones (E.C. 1.10.3.2). PPO activities with diphenolic substrates are higher than with monophenolic substrate (tyrosine) in both embryo and endosperm tissues. Time course of PPO activities in embryo and endosperm of maize seeds treated with boron during and following germination is shown | Zea mays | ? | - |
? | |
tyrosine + O2 + AH2 | - |
Zea mays | dopa + H2O + A | - |
? |
Synonyms | Comment | Organism |
---|---|---|
polyphenol oxidase | - |
Zea mays |
PPO | - |
Zea mays |