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A palynological study of the genus Nepeta L. (Lamiaceae)

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Abstract

The pollen morphology of forty taxa of the genus Nepeta L. was studied and documented in detail using light microscopy (LM) and scanning electron (SEM) microscopy in this study. Nepeta L. pollen grains are small to large (P = 18.64–63.46 μm, E = 15.62–46.33 μm), suboblate to perprolate (P/E = 0.86–2.09) in shape and hexacolpate (very rarely tetracolpate) with granular membranes. Alternate position of colpi occurs in six Nepeta taxa, N. nuda ssp. glandulifera, N. concolor, N. crinita, N. congesta var. cryptantha, N. stricta var. stricta and N. sibthorpii ssp. tumeniana. In examinations of exine ornamentation with SEM, two types of pollen grains were recognized: (1) type I, with microreticulate sculpture; and (2) type II with bireticulate sculpture, type I and II to be divided into two and five subtypes, respectively. In the two taxa with microreticulate pattern, N. pilinux and N. sulfuriflora, a tendency towards a bireticulum could be recognized due to traces of secondary tectal connections. The bireticulate exine ornamentation is characterized with varying characteristics of the primary muri and secondary reticulum. Pollen morphology within the genus is compared with infrageneric relationships.

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Acknowledgments

This study is the Ph.D. thesis of the first author and supported by the Uludag University Research Foundation Centre (project number: 2001/62).

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Correspondence to Sevcan Celenk.

Appendix

Appendix

Voucher specimens of the genus Nepeta L. which are examined in the present study

Species

Voucher information

N. aristata Boiss. et Kotschy ex Boiss.

Kesis Mountain-Malatya, 17.07.2002. Dirmenci 24333

N. baytopii Hedge and Lamond

Diyarbakir, 16.07.2001. Dirmenci 24348

N. betonisifolia C. A. Meyer

Erzurum, 16.06.2002. Yildiz and Dirmenci 24321

N. cadmea Boiss.

Honaz Mountain-Denizli, 30.06.1999. Dirmenci 24286

N. caesarea Boiss.

Icel, 06.08.2002. Yildiz and Dirmenci 24310

N. cataria L.

Malatya, 11.08.2001. Dirmenci 24296

N. cilicia Boiss.

Kahramanmaraş, 15.07.2002. Dirmenci 24327

N. concolor Boiss. and Heldr.

Geyik mountain-Antalya, 10.08.2002. Dirmenci 24329

N. conferta Hedge and Lamond

Ciglikara Forest-Antalya, 29.06.2000. Dirmenci 24295

N. congesta Fisch. et Mey. var. cryptantha (Boiss.) Hedge and Lamond

Van, 08.06.2001. Dirmenci 24352

N. congesta Fisch. et Mey. var. congesta Fisch. and Mey.

Eskisehir, 31.05.2002. Yildiz and Dirmenci 24351

N. crinita Montbret and Aucher ex Bentham

Kube Mountain-Malatya, 18.07.2002. Dirmenci 24312

N. fissa C.A. Meyer

Sivas, 23.07.2002. Yildiz and Dirmenci 24341

N. flavida Hub.-Mor

Osmaniye, 15.07.2002. Dirmenci 24292

N. glomerata Montbret et Aucher ex Bentham

Antalya, 13.07.2002. Dirmenci 24330

N. heliotropifolia Lam. var. heliotropifolia Lam.

Kars, 13.06.2002. Dirmenci 24356

N. humilis Benth.

Hakkari, 09.06.2002. Dirmenci 24358

N. isaurica Boiss. and Heldr

Geyik Mountain-Antalya, 22.07.1999. Yildiz and Dirmenci 24308

N. italica L

Balikesir, 30.05.2001. Dirmenci 24280

N. lamiifolia Wild

Suphan Mountain-Bitlis, 23.07.2001. Dirmenci 24339

N. macrosiphon Boiss.

Kambos Mountain-Bitlis, 30.07.2001. Dirmenci 24347

N. meyeri Bentham

Erzurum, 06.06.2001. Dirmenci 24349

N. nuda L. ssp. albiflora (Boiss.) Gams

Kars, 22.07.2000. Yildiz and Dirmenci 24301

N. nuda L. ssp. nuda L.

Balikesir, 05.07.2000. Dirmenci 24298

N. nuda L. ssp. glandulifera Hub.-Mor and Davis

Icel, 10.07.2001. Dirmenci 24303

N. nuda L. ssp. lydiae Davis

Denizli, 28.06.1999. Dirmenci 24304

N. obtusicrena Boiss. et Kotschy ex Hedge

Bitlis, 18.07.2001. Dirmenci, 24346

N. phyllochlamys P. H. Davis

Antalya, 02.06.2002. Yildiz and Dirmenci 24306

N. pilinux P. H. Davis

Antalya, 10.08.2002. Dirmenci 2429

N. pilinux P. H. Davis

Antalya, 10.08.2002. Dirmenci 24294

N. racemosa Lam.

Kars, 12.06.2002. Dirmenci 24314

N. sibthorpii subsp. tumeniana B. Yildiz and T. Dirmenci

Kaz Mountain-Balikesir, 15.07.2003. Dirmenci 24366

N. sorgerae Hedge and Lamond

Malatya, 18.07.2002. Dirmenci 24313

N. stenantha Kotschy and Boiss. ex Boiss.

Erzurum, 30.07.2001. Dirmenci 24323

N. stricta (Banks and Sol.) Hedge and Lamond var. curvidens (Boiss and Bal) Hedge and Lamond

Agri, without date. Dirmenci 24355

N. stricta (Banks and Sol.) Hedge and Lamond var. stricta (Banks and Sol.) Hedge and Lamond

Eskisehir, 31.05.2002. Yildiz and Dirmenci 24354

N. sulfuriflora P. H. Davis

Antalya, 07.07.2000. Dirmenci 24290

N. supina Steven

Buyuk Agri Mountain-Igdir, 01.08.2002. Dirmenci 24326

N. trachonitica Post

Hakkari, 19.6.2004. Dirmenci 24324

N. transcaucasica Grossh.

Agri, 06.06.2001. Dirmenci 24316

N. viscida Boiss.

Balikesir, 05.07.2000. Dirmenci 24309

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Celenk, S., Dirmenci, T., Malyer, H. et al. A palynological study of the genus Nepeta L. (Lamiaceae). Plant Syst Evol 276, 105–123 (2008). https://doi.org/10.1007/s00606-008-0062-7

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