Abstract

The variability of metric traits has been studied in 20 Kazakhstan populations of three Nitraria species (N. schoberi L., N. sibirica Pall., and N. komarovii Iljin & Lava ex Bobrov). According to the results, N. sibirica differs from N. schoberi and N. komarovii in small leaves, fruits, and seeds, as well as in the structural features of inflorescences and flowers. N. sibirica is characterized by a greater number of flowers per inflorescence (25–66 on average) than N. schoberi and N. komarovii (14–28 on average). Additionally, N. sibirica differs from N. schoberi by narrower (1.3×) petals and smaller anthers (1.46× in length and 1.2× in width) and pistils (1.25× in length and 1.44× in width). N. komarovii differs from N. schoberi by narrower leaves (1.7×). N. komarovii is characterized by relatively large (especially in width) size of anthers that, together with smaller petals, makes it possible to distinguish this species during flowering. Flowers of N. komarovii are bright yellow, while those in N. schoberi and N. sibirica are white and light purple, respectively. N. komarovii fruits are orange, pale red, or bright red. Fruits of N. schoberi and N. sibirica are dark burgundy and black, respectively. At the intraspecific level, most of the studied metric traits (except for the habitus of N. sibirica plants) are stable and do not depend on the 16 climatic parameters of plant habitats. At the same time, a number of morphological features have been revealed in N. sibirica plants from the Ili Depression. In these populations, N. sibirica plants form shrubs up to 1.8 m in height with a large (up to 90) number of flowers per inflorescence, large petals (3.5 mm in length and 2.2 mm in width on average), small (~0.6 mm) anthers, small (5–5.5 mm in length) fruits, and small (~4 mm in length) narrow ovate stones. These features indicate the ecological–geographical differentiation of N. sibirica under the extra-arid conditions of the stony desert of the depression and evidence a separate taxonomic rank of these populations.

中文翻译：

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哈萨克斯坦中部和南部 Nitraria 物种的形态变异

摘要

已经在三个Nitraria物种（N. schoberi L.、N. sibirica Pall. 和N. komarovii Iljin & Lava ex Bobrov）的20 个哈萨克斯坦种群中研究了度量性状的变异性。结果表明，西伯利亚猪笼草在小叶、果实和种子以及花序和花的结构特征上与猪笼草和科马罗夫猪笼草不同。N. sibirica的特点是每个花序的花数（平均 25-66）比N. schoberi和N. komarovii（平均 14-28）多。此外，N. sibirica不同于N. schoberi由更窄的 ( 1.3x ) 花瓣和更小的花药（1.46x 长和 1.2x 宽）和雌蕊（1.25x 长和 1.44x 宽）组成。N. komarovii与N. schoberi的不同之处在于更窄的叶子 ( 1.7x )。N. komarovii的特点是花药相对较大（尤其是宽度），加上较小的花瓣，可以在开花期间区分该种。N. komarovii 的花是亮黄色，而N. schoberi和N. sibirica 的花分别是白色和浅紫色。N. komarovii果实呈橙色、淡红色或鲜红色。N. schoberi 的果实和N. sibirica分别是深酒红色和黑色。在种内水平上，大多数研究的度量性状（除N. sibirica植物的习性外）是稳定的，不依赖于植物栖息地的 16 个气候参数。同时，在伊犁坳陷的西伯利亚猪笼草中发现了许多形态特征。在这些种群中，N. sibirica植物形成高达 1.8 m 的灌木，每个花序有大量（多达 90）朵花、大花瓣（平均长度为 3.5 毫米，宽度为 2.2 毫米）、小（约 0.6毫米）花药、小（5-5.5 毫米长）果实和小（约 4 毫米长）窄卵形核。这些特征表明了生态-地理分异N. sibirica在洼地石漠的极端干旱条件下，并证明了这些种群的独立分类等级。