ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05947.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

Abstract—In a previous publication we have presented some results on tobacco pith tissue cultures grown in relatively monochromatic light (around 4350,5250, 6600 and 8000 Å).This paper points out specially that cultures subjected to a continuous blue light period of 12 days only, followed by a darkness period of 29 days, grew no more than cultures exposed to the same radiations during the 41‐day period of the experiment.The growth was only 67 per cent of that of tissues grown in the darkness.The morphologic and histologic observations showed the same differences between the cultures grown in blue light conditions and the cultures grown in the other light conditions, as also reported elsewhere.Observation of bud developement on stem segment culturesin vitroof willow, grown under these relatively monochromatic light conditions, together with these histologic studies, leads us to believe in a possible gibberelline action in blue l

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05948.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05949.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

Abstract—Light is not necessary for the formation of buds by tissues of chicory roots. However, in darkness, their number is reduced and the development of leaves is slowed down considerably. Absence of light also reduces the proliferative capacity of leaf explants as well as the number of buds formed on them. The number of buds is greater and their growth more rapid for longer periods of illumination. Also, the photoperiod conditions the formation of flowersin vitr

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05950.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05951.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

Abstract—Kinetic studies with the mustard seedling (Sinapis albaL.) support the hypothesis that the so‐called ‘high energy reaction’ of photomorphogenesis can be understood solely on the basis of phytochrome. Light‐induced anthocyanin synthesis (a typical ‘positive’ photoresponse(1)and light dependent inhibition of hypocotyl lengthening (a typical ‘negative’ photoresponse(1)) have been investigated. In order to explain the experimental data we have to assume that there are two different types of phytochrome 730 which differ greatly as far as their resistance to irreversible destruction is concerned. The existence of these two different types of phytochrome 730 has already been postulated on the basis of spectrophotometric measu

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05952.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05953.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

Abstract—Experiments with irradiation sequences where red precedes far‐red lead to the conclusion that, in turnip, phytochrome is the only pigment mediating anthocyanin synthesis in red and far‐red. Results from experiments where far‐red precedes red, however, suggest that more than one reaction is involved. A possible interpretation is that the ‘high‐energy’ reaction in far‐red and the low energy red/far‐red reversible reaction are mediated by two different forms of phytochrome.The ‘high‐energy’ reaction in blue light does not appear t

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05954.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05955.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY

摘要:

Abstract—Synthesis and degradation of anthocyanins in the leaves ofPerilla nankinensis(S.D. plant) were studied in relation to photoperiod, light intensity and floral induction. No relation was found between anthocyanin degradation and floral induction as suggested earlier by Ermolaeva and Sironval. Discussion is opened on the significance of the observed variations of anthocyanin content in the leaves and on their relation with photosynthesis and respiratio

ISSN:0031-8655    

DOI:10.1111/j.1751-1097.1966.tb05956.x

出版商:Blackwell Publishing Ltd    

年代:1966

数据来源: WILEY