Contributions to the Pollen morphology of the  family Compositae

Anjum PERVEEN

Makale detayları

Contributions to the Pollen morphology of the family Compositae

Yazarlar:

Anjum PERVEEN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 1999 Vol.23 Issue 4, pp.523-536

Belge Tipi:

Makale

Yayın Tarihi:

3/1999

Belge Dili:

Türkçe

Document ID (Org No.):

2000814227

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

Anahtar kelimeler:

Özet:

 

The pollen morphology of 24 species of Compositae belonging to 18 genera was examined  by light and scanning microscopy. The present data confirms the eurypalynous nature of the family.  Delimitation of the genera on the basis of pollen characters is less marked. Pollen grains usually  radially symmetrical, isopolar rarely apolar; tricolporate, often porate. Shape commonly oblate-spheroidal  to prolate-spheroidal, with some suboblate to subprolate types. Tectum echinate to  echinolophate, often non-echinate. Tectum in-between the spines or spinules is sub-psilate, or  perforated to striate. On the basis of the exine pattern, 4 distinct pollen types are recognized viz.,  Pollen type-I: Dicoma tomentosa, Pollen type-II: Eclipta prostrata, Pollen type-III: Echinops echinatus  and Pollen type-IV: Launaea nudicaulis.  Within the pollen types, pollen characters are significantly sufficient for characterization of the species.  An interesting correlation observed is that the taxa having spiny capitula have a mostly non-echinate  or spinulose tectum with very thick exine (7-25 ?m).

 

The pollen morphology of 24 species of Compositae belonging to 18 genera was examined  by light and scanning microscopy. The present data confirms the eurypalynous nature of the family.  Delimitation of the genera on the basis of pollen characters is less marked. Pollen grains usually  radially symmetrical, isopolar rarely apolar; tricolporate, often porate. Shape commonly oblate-spheroidal  to prolate-spheroidal, with some suboblate to subprolate types. Tectum echinate to  echinolophate, often non-echinate. Tectum in-between the spines or spinules is sub-psilate, or  perforated to striate. On the basis of the exine pattern, 4 distinct pollen types are recognized viz.,  Pollen type-I: Dicoma tomentosa, Pollen type-II: Eclipta prostrata, Pollen type-III: Echinops echinatus  and Pollen type-IV: Launaea nudicaulis.  Within the pollen types, pollen characters are significantly sufficient for characterization of the species.  An interesting correlation observed is that the taxa having spiny capitula have a mostly non-echinate  or spinulose tectum with very thick exine (7-25 ?m).

Makale detayları

Contributions to the Pollen morphology of the family Compositae

Yazarlar:

Anjum PERVEEN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 1999 Vol.23 Issue 4, pp.523-536

Belge Tipi:

Makale

Yayın Tarihi:

3/1999

Belge Dili:

Türkçe

Document ID (Org No.):

2000814227

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

Pollen morphology

Compositae

Eurypalynous

Sayı

Makale detayları

Contributions to the Pollen morphology of the family Compositae

Yazarlar: Anjum PERVEEN

Yayıncı: TUBITAK

Dergi: Turkish Journal of Biology 1999 Vol.23 Issue 4, pp.523-536

Belge Tipi: Makale

Yayın Tarihi: 3/1999

Belge Dili: Türkçe

Document ID (Org No.): 2000814227

Sıklık: İki Aylık

eISSN: 1303-6092

pISSN: 1300-0152

Pollen morphology

Compositae

Eurypalynous

Sayı

Yazarlar:

Anjum PERVEEN

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 1999 Vol.23 Issue 4, pp.523-536

Belge Tipi:

Makale

Yayın Tarihi:

3/1999

Belge Dili:

Türkçe

Document ID (Org No.):

2000814227

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152