A phylogenetic review of Bupleureae, Bupleurum exscapum, a new combination for Hohenackeria exscapa

Document Type : Research Paper

Author

Botany Research Division, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization, Tehran, Iran

Abstract

A phylogenetic study of the tribe Bupleureae (Apiaceae) was conducted using nrDNA ITS data. The results show that Bupleureae has a distinct position within the family, comprising two distinct clades. Hohenackeria exscapa is placed in a clade with other examined species of the genus Bupleurum. Traditionally, the genus Hohenackeria, was considered a close relative of Bupleurum but differs from it in having white flowers, sessile umbels, a conspicuous calyx, the absence of bracteoles and a carpophore. Phylogenetic results represented Hohenackeria exscapa within Bupleurum subgen. Bupleurum, close to B. baldense. Several morphological characters and phylogenetic signals support their relationships. Both species have slender tap roots, linear to oblong-lanceolate leaves that attenuate into a petiole with sessile cauline leaves. Flowers and fruits in B. baldense are generally enveloped by bracteoles, and pedicels are subequal and short, while in H. exscapa pedicels are shorter and umbels are hidden by radical leaves instead of bracteoles, so the concave bracteoles in B. baldense may play the hiding role for umbels. Hohenackeria exscapa was here subsumed within Bupleurum as a new combination.

Keywords

Article Title [Persian]

مروری بر فیلوژنی Bupleureae، و Bupleurum exscapum ترکیب جدیدی برای Hohenackeria exscapa

Author [Persian]

  • مهرنوش پناهی
بخش تحقیقات گیاهشناسی، موسسه تحقیقات جنگل ها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران
Abstract [Persian]

مطالعه فیلوژنتیک طایفه Bupleureae (تیره چتریان) توسط داده ­های nrDNA ITS انجام گردید. نتایج نشان داد که Bupleureae یک موقعیت مجزا در تیره چتریان دارد. گونه Hohenackeria exscapa در یک شاخه همراه با سایر گونه­ های جنس Bupleurum قرار می­ گیرد. به­ طور مرسوم، جنس Hohenackeria در رابطه نزدیک با Bupleurum قرار داشت اما در صفاتی مانند گل­های سفید، چترهای بدون دمگل، کاسبرگ­های آشکار، و فقدان برگک و کارپوفور با آن متفاوت بود. نتایج فیلوژنتیک،Hohenackeria exscapa  را در زیرجنس Bupleurum، نزدیک به گونه Bupleurum baldense قرار داد. چندین صفت ریخت­ شناسی به همراه سیگنال­های فیلوژنتیکی رابطه خویشاوندی آنها را حمایت نمود. هر دو گونه دارای ریشه­ های راست کوتاه، برگ­های خطی تا کشیده سرنیزه ­ای که در انتها به صورت دمبرگ به ساقه چسبیده، با برگ­های ساقه­ای بدون دمبرگ می­ باشند. گل­ها و میوه­ ها معمولا در B. baldense توسط برگک­ ها در برگرفته می­ شود و دمگل­ ها کوتاه و نابرابر هستند درحالیکه در H. exscapa دمگل ­ها کوتاه­تر و چترهای گل توسط برگ­های قاعده ­ای بجای برگک­ها مخفی می­ شوند بنابراین، برگک ­های مقعر در B. baldense نقش مخفی نگهداشتن چترها را برعهده دارند. در این مطالعه، گونهHohenackeria exscapa  به جنس Bupleurum به­ عنوان یک ترکیب جدید انتقال می­ یابد.

Keywords [Persian]

  • چتریان
  • Bupleurum
  • فیلوژنی مولکولی
  • ترکیب جدید
  • nrDNA ITS
  • ایران

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History

  • Receive Date: 04 November 2025
  • Revise Date: 13 May 2026
  • Accept Date: 28 May 2026

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