Reproductive Biology of Bupleurum euphorbioides, a Vulnerable Alpine Herb in Korea, Impacted by Climate Change

• 영문명: Reproductive Biology of Bupleurum euphorbioides, a Vulnerable Alpine Herb in Korea, Impacted by Climate Change
• 발행기관: 국립공원연구원
• 저자명: 장태수(Tae-soo Jang) 김현진(Hyeonjin Kim) 안유은(Yueun An) 정다은(Daeun Jung) 최보경(Bokyung Choi) 박홍철(Hong-chul Park) 윤형진(Hyeongjin Yoon) 최대훈(Daehoon Choi) 김진원(Jin-won Kim) 강대현(Dae-hyun Kang) 소순구(Soonku So) 명현호(Hyeon-ho Myeong)
• 간행물 정보: 『국립공원연구지』제15권 제1호, 189~195쪽, 전체 7쪽
• 주제분류: 자연과학 > 생물학
• 파일형태: PDF
• 발행일자: 2024.06.30

국문 초록

Species diversity and habitat transformation are affected by climate change, both directly and indirectly, with correlations observed in terms of species specificity. Alpine and subalpine climate-sensitive plants frequently exhibit morphological plasticity by adjusting their physiological and reproductive processes to adapt to significant environmental changes. Bupleurum euphorbioides is a cold-adapted herb found on the rocky slopes of South Korea. Owing to climate shifts and human activities, its population has decreased. We conducted studies on pollen morphology, pollen viability, and sexual systems to better understand environmental adaptations. In this study, we observed extensive synchrony in the sexual maturity phases of B. euphorbioides flowers both within and across individual inflorescences. The population exhibited highly synchronized mass flowering, which may represent an adaptation to challenging environments where a brief breeding season necessitates the simultaneous blossoming of a large number of flowers. We documented the sexual expression of B. euphorbioides and distinctly observed protandry, wherein pollen presentation preceded stigma receptivity. All examined individuals of B. euphorbioides exhibited significant variation in pollen viability ranging from 0.04% to 95.54%, even within a single population. Meiotic failure or apomictic reproduction is possible in individuals with low pollen fertility. While fertile pollen grains displayed a prolate shape with a well-stained cytoplasm, sterile pollen grains were characterized by their smaller size and lack of stained cytoplasm. Therefore, more thorough observations of the meiotic behavior using an expanded range of plant materials are necessary to investigate the function of the distinct reproductive system of B. euphorbioides.

목차

Introduction

Materials and Methods

Results and Discussion

Acknowledgments

References

키워드

Alpine plants breeding system pollen viability