Evidence for a graft-transmissible substance which delays apical senescence in Pisum sativum L

Apical senescence in an early flowering line of pea, G2, is greatly delayed by short days. This behavior is controlled by two dominant genes. Apical senescence of ungrafted, insensitive (I) lines is unaffected by photoperiod. When I-type scions with one of the two required genes were grafted onto G2...

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Bibliographic Details
Published in:Planta 1977, Vol.135 (1), p.93-94
Main Authors: Proebsting, W.M., Davies, P.J., Marx, G.A.
Format: Article
Language:English
Subjects:
Cellular senescence
Delay lines
Flowering
Fruits
Graftage
Peas
Photoperiod
Plants
Scions
Short Communication
Tissue grafting
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Summary:Apical senescence in an early flowering line of pea, G2, is greatly delayed by short days. This behavior is controlled by two dominant genes. Apical senescence of ungrafted, insensitive (I) lines is unaffected by photoperiod. When I-type scions with one of the two required genes were grafted onto G2, apical senescence of the I-type was delayed in short days, but not in long days. Flowering of the I-type was unaffected. The apex of the G2 stock was unaffected as well. Apical senescence of an I-type line lacking both photoperiod genes was not delayed when grafted on G2 in short days. It is concluded that G2 plants grown in short days produce a graft-transmissible factor which delays apical senescence of photoperiodically insensitive lines.
ISSN:0032-0935
1432-2048
DOI:10.1007/BF00387982