ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1955.tb00013.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SUMMARY1The structure and growth of the vegetative, inflorescence and floral apices ofArabidopsis thaliana(L.) Heynh.,Gapsella bursa‐pastoris(L.) Medic, andAnagallis arvensisL. have been investigated.2The vegetative apices of all three plants show tunica and corpus zones and the normal cyto‐histological zonation.3Leaf primordia are initiated by periclinal divisions in the second tunica layer of the apex, and show apical and marginal growth during their early development.4Leaf procambium development is always continuously acropetal.5InAnagallis, axillary vegetative buds arise as detached parts of the apical meristem and their traces develop basipetally to join the traces of the sub. tending leaves.6No marked morphological changes are to be observed inAnagallisduring the formation of the inflorescence, but, inArabidopsisandCapsella, marked changes have been observed and have been fully described.7The inflorescence apices of all three species show tunica and corpus zones and a cyto‐histological zonation. It has been shown that these apices are essentially similar to those of vegetative shoots.8Flower primordia are initiated by periclinal divisions in the third layer of the flank meristem of the inflorescence apex.9Procambium development to the flower primordia is continuously acropetal.10The floral apex shows tunica and corpus zones.11All the floral parts are initiated by periclinal divisions in the second tunica layer, and procambium development to these parts is again continuously acropetal.12A possible homology between foliage leaves and flower parts has been discussed. 13. In all three plants, the petals are the last of the flower parts to m

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1955.tb00014.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

摘要:

SUMMARYA taxonomic scoring method is used to classify the edible bananas and to provide evidence on their evolution. Edible diploid forms ofMusa acuminataare thought to be the primary source of the whole group to which another species,M, baibisiana, has contributed by hybridization. Thus there exist diploid and triploid edible forms ofM. acuminataand diploid, triploid and tetraploid hybrid types of genetic constitutions that vary according to their histories. There is a faint possibility that a third wild species has contributed to the origins of a small group of triploid hybrid types. Triploidy was probably established under human selection for vigour and fruit size; tetraploidy is inexplicably rare. The centre of origin of the group is Indo‐Malaya and Malaya is probably the primary centre. The two Ldnnaean speciesM. paradisiacaandM. sapientumrefer to identifiable edible varieties which are both shown here to be of hybrid origin. The names therefore may be rejected from the nomenclature of the wild banana

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1955.tb00015.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1955.tb00016.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1955.tb00017.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY

ISSN:0368-2927    

DOI:10.1111/j.1095-8339.1955.tb00018.x

出版商:Blackwell Publishing Ltd    

年代:1955

数据来源: WILEY