Morphological variability of species of the genus nitraria in central and south kazakhstan
E. V. Banaev1, M. A. Tomoshevich1, T. A. Ak-Lama1,2
1Central Siberian Botanical Garden of SB RAS, Novosibirsk, Russia
2State Budgetary Institution Republic of Tuva “Tuva Scientific Center”, Kyzyl, Russia
Keywords: Kazakhstan, intraspecific variation, interspecific differences, lamin a, seed, corolla petal, anther
Abstract
The variability of metric characters of three species of the genus Nitraria ( N. schoberi L., N. sibirica Pall., N. komarovii Iljin & Lava ex Bobrov) in 20 populations of Kazakhstan was studied. It was found that N. sibirica differs from N. schoberi and N. komarovii in small leaves, fruits and seeds, and in the structural features of the inflorescence and flower. N. sibirica is characterized by a larger number of flowers per inflorescence (on average 25-66 pcs.), Compared to N. schoberi and N. komarovii (on average, 14-28 pcs.). N. sibirica also differs from N. schoberi in narrow corolla petals (1.3 times), small anthers (1.46 times in length and 1.2 times in width) and pistils (1.25 times in length and 1.44 times wide). N. komarovii differs from N. schoberi in narrow leaves (1.7 times). N. komarovii has relatively large anthers, especially in width, which, together with smaller corolla petals, distinguishes this species in flowering - N. komarovii flowers look bright yellow, while in N. schoberi they are white, in N. sibirica they are light purple. N. komarovii fruits are orange, pale or bright red. In N. schoberi , fruits are dark-bordered, in N. sibirica , they are black. At the intraspecific level, the stability of most of the metric characters and their independence, except for the habitus of N. sibirica plants, from the 16 studied climatic parameters of the habitats were revealed. At the same time, a number of morphological features were revealed in N. sibirica plants in populations from the Ili Basin. In these populations, N. sibirica plants form bushes up to 1.8 m tall, with a large number of flowers per inflorescence (up to 90 pcs.), Large corolla petals (on average 3.5 mm long; 2.2 mm wide), small anthers (about 0.6 mm), small fruits (5-5.5 mm long) and small (about 4 mm long) narrow ovate bones. These features indicate the ecological-geographical differentiation of N. sibirica under the extra-arid conditions of the stony desert of the basin, and testify in favor of a separate taxonomic rank of these populations.
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