Cytokinins in the Spring Sap of Curly Birch (Betula pendula f. carelica) and the Non-Curly Form

Ahokas, Hannu

doi:10.1016/s0176-1617(85)80162-0

Cited by 15 publications

(4 citation statements)

References 16 publications

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“…Изучение связанных и свободных аминокислот, углеводов и липи-дов в тканях разных видов березы показало, что основ-ные изменения в их содержании и составе связаны, как правило, со сменой фаз развития растений. Ряд авторов отмечают в пасоке карельской березы в отдельные годы повышенное содержание цитокинина [45], глутаминовой кислоты [44] или отсутствие сорбитола [80]. По сравне-нию с березой повислой и березой пушистой у карель-ской березы выше доля суммарных липидов в лубе ство-ла (в 2 раза) и ниже в бересте (на 15-20 %) [6,7].…”

Section: характер анатомо-морфологических и физиолого-биохимических иunclassified

Genesis of the karelian birch. an ecogenetic hypothesis

Vetchinnikova

Титов

2016

Ecological genetics

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Relying on the analysis of data from the literature and own findings the authors develop and specify the previously postulated ecological-genetic hypothesis of the curly birch origins, which is based on the concept of interactions between specific natural-climatic factors and conditions in the north-western continental Europe during so-called Little Ice Age (LIA), the high genetic polymorphism, and the adaptive nature of many anatomical-morphological traits and physiological-biochemical characteristics of the representatives of the genus Betula L. growing in the area. The various facts and observations in favour of the ecological-genetic hypothesis of the origins of curly birch are reported.

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Section: характер анатомо-морфологических и физиолого-биохимических иunclassified

Genesis of the karelian birch. an ecogenetic hypothesis

Vetchinnikova

Титов

2016

Ecological genetics

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“…The origin of the birch with a patterned wood texture is also unclear. Most authors consider it to be either a variety (Ermakov 1986, Hämet-Ahti et al 1992, Kosonen 2004 or a form of B. pendula (Ahokas 1985), but some have considered it as a distinct species (Lyubavskaya 1978, Pobirushko 1992, Vetchinnikova et al 2013. Vetchinnikova and Titov (2017) proposed an ecogenetic hypothesis to explain the origin of the Karelian birch.…”

Section: Introductionmentioning

confidence: 99%

Analyses of molecular markers and leaf morphology of two rare birches, Betula obscura and B. pendula var. carelica

Jadwiszczak

Ветчинникова

Bona

et al. 2020

AFR

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Trees and shrubs belonging to the Betula L. genus seem to represent one of the most confused interspecific relationships, and hybridization is considered to be one of the main factors responsible for the substantial genetic and morphological variation of birches. In the present investigation, the internal transcribed spacer ITS1 and ITS2 regions of nuclear ribosomal DNA, nuclear alcohol dehydrogenase (ADH) gene sequences and amplified fragment length polymorphisms (AFLPs) as well as the Atkinson discriminant function (ADF) of leaf morphology were used to verify hypotheses concerning the origin of the dark barked Betula obscura and B. pendula var. carelica with the patterned wood. Both plants were considered by different authors to be distinct species, intraspecific forms of common B. pendula or B. pubescens, or hybrid taxa between B. pendula and B. pubescens. In the phylogenetic trees, the ITS and ADH gene sequences of both B. obscura and B. pendula var. carelica clustered with those of B. pendula, whereas B. pubescens trees were somewhat distinct. In turn, the AFLPs revealed genetic similarity of B. pendula var. carelica to both frequent species, whereas B. obscura was clearly distinct from other birches. Values of the ADF indices of the rare birches were typical for B. pendula. In the light of the results obtained, we imply that B. obscura and B. pendula var. carelica represent an intraspecific variation of B. pendula, they are neither intraspecific taxa of B. pubescens nor hybrid species between the common birches. Different grouping of B. obscura in the AFLPs and DNA sequences analyses is likely a result of an unreliable phylogenetic signal of the former molecular markers.

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“…Большинство авторов связывают образование узорчатой древесины карельской березы с нарушением деятельности камбия и дифференциации камбиальных производных [Барильская, 1978;Ahokas, 1985;Коровин, Зуихина, 1985;Коровин, 1987;Коровин и др., 2003;Naujoks et al, 2017]. Камбийгетеротрофная ткань, его активность находится в прямой зависимости от притока фотоассимилятов [Kandiah, 1979;Oribe et al, 2003;.…”

Section: Introductionunclassified