(波波夫)阿卡尼和罗尔森的栖息地、植物多样性、形态学、解剖学及分子系统发育
Habitats, Plant Diversity, Morphology, Anatomy, and Molecular Phylogeny of (Popov) Akhani & Roalson.
作者信息
Islamgulova Anastassiya, Osmonali Bektemir, Skaptsov Mikhail, Koltunova Anastassiya, Permitina Valeriya, Imanalinova Azhar
机构信息
Institute of Botany and Phytointroduction, 36D Timiryazev Str., Almaty 050040, Kazakhstan.
South Siberian Botanical Garden, Altai State University, Lesosechnaya Str. 25, Barnaul 656906, Russia.
出版信息
Plants (Basel). 2025 Jul 24;14(15):2279. doi: 10.3390/plants14152279.
(Popov) Akhani & Roalson is listed in the Red Data Book of Kazakhstan as a rare species with a limited distribution, occurring in small populations in Kazakhstan, Uzbekistan, and Turkmenistan. The aim of this study is to deepen the understanding of the ecological conditions of its habitats, the floristic composition of its associated plant communities, the species' morphological and anatomical characteristics, and its molecular phylogeny, as well as to identify the main threats to its survival. The ecological conditions of the habitats include coastal sandy plains and the slopes of chinks and denudation plains with gray-brown desert soils and bozyngens on the Mangyshlak Peninsula and the Ustyurt Plateau at altitudes ranging from -3 to 270 m above sea level. The species is capable of surviving in arid conditions (less than 100 mm of annual precipitation) and under extreme temperatures (air temperatures exceeding 45 °C and soil surface temperatures above 65 °C). In communities, we recorded 53 species of vascular plants. Anthropogenic factors associated with livestock grazing, industrial disturbances, and off-road vehicle traffic along an unregulated network of dirt roads have been identified as contributing to population decline and the potential extinction of the species under conditions of unsustainable land use. The morphometric traits of could be used for taxonomic analysis and for identifying diagnostic morphological characteristics to distinguish between species of . The most taxonomically valuable characteristics include the fruit diameter (with wings) and the cone-shaped structure length, as they differ consistently between species and exhibit relatively low variability. Anatomical adaptations to arid conditions were observed, including a well-developed hypodermis, which is indicative of a water-conserving strategy. The moderate photosynthetic activity, reflected by a thinner palisade mesophyll layer, may be associated with reduced photosynthetic intensity, which is compensated for through structural mechanisms for water conservation. The flow cytometry analysis revealed a genome size of 2.483 ± 0.191 pg (2n/4x = 18), and the phylogenetic analysis confirmed the placement of within the tribe Salsoleae of the subfamily Salsoloideae, supporting its taxonomic distinctness. To support the conservation of this rare species, measures are proposed to expand the area of the Ustyurt Nature Reserve through the establishment of cluster sites.
(波波夫)阿克哈尼藜与罗尔森藜被列入哈萨克斯坦《红皮书》,属于分布范围有限的珍稀物种,在哈萨克斯坦、乌兹别克斯坦和土库曼斯坦以小种群形式存在。本研究的目的是加深对其栖息地生态条件、相关植物群落的植物区系组成、该物种的形态和解剖特征及其分子系统发育的理解,同时确定其生存面临的主要威胁。其栖息地的生态条件包括沿海沙质平原以及裂缝和剥蚀平原的斜坡,土壤为灰棕色荒漠土,分布于曼格什拉克半岛和乌斯秋尔特高原,海拔在海平面以下3米至270米之间。该物种能够在干旱条件下(年降水量不足100毫米)以及极端温度下(气温超过45℃,土壤表面温度高于65℃)生存。在群落中,我们记录了53种维管植物。已确定与牲畜放牧、工业干扰以及沿着未经规划的土路网络的越野车辆交通相关的人为因素,在土地利用不可持续的情况下,这些因素导致了该物种的种群数量下降和潜在灭绝。阿克哈尼藜的形态测量特征可用于分类分析以及识别诊断性形态特征,以区分阿克哈尼藜的不同物种。在分类学上最有价值的特征包括果实直径(带翅)和圆锥状结构长度,因为它们在不同物种之间存在一致差异且变异性相对较低。观察到了对干旱条件的解剖学适应,包括发育良好的皮下组织,这表明其具有节水策略。栅栏叶肉层较薄所反映出的适度光合活性,可能与光合强度降低有关,这通过节水的结构机制得到补偿。流式细胞术分析显示基因组大小为2.483±0.191皮克(2n/4x = 18),系统发育分析证实阿克哈尼藜在猪毛菜亚科猪毛菜族内的分类地位,支持其分类学独特性。为支持对这种珍稀物种的保护,建议采取措施通过建立集群地点来扩大乌斯秋尔特自然保护区的面积。