Intra- and intertissular cytomictic interactions in the microsporogenesis of mono- and dicotyledonous plants

Kravets, E. A.; Sidorchuk, Yu. V.; Horyunova, I. I.; Plohovskaya, S. H.; Mursalimov, Sergey; Дейнеко, Е. В.; Yemets, А. І.; Blume, Ya. B.

doi:10.3103/s0095452716050054

Cited by 11 publications

(8 citation statements)

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“…lily, onion, barley), we differentiated cytomixis according to three types of interactions, namely pair-looped, donor-recipient and chained type. 25,26 These varieties may occur within a single population of microsporocytes either sequentially or simultaneously. Apparently, pair-looped and donor-recipient interactions are more typical of spontaneous cytomixis, whereas chained interactions of induced one.…”

Section: A Variety Of Structural and Functional Types Of Cytomixismentioning

confidence: 99%

Cytomixis as a primary form of sexual process

2018

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Background: In this review presents a new concept of the functional role of cytomixis. Anther is a self-organizing system where microsporocytes demonstrate certain traits of individuality and social behaviour, in particular altruism, competition and collective self-organization. Cytomixis function in microsporogenesis is comparable with evolutionarily primary and primitive form of sexual process where genetic recombination, DNA repair, cell-to-cell transfer and mixing of genes are happen creating a mixed gene pool of a microsporocytes population. Owing to cytomixis, microsporocytes not only get rid of excess mutations, maintain their polymorphism and heterozygosity, but also form an evolutional reserve.

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Section: A Variety Of Structural and Functional Types Of Cytomixismentioning

confidence: 99%

Cytomixis as a primary form of sexual process

2018

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“…In monocots cytomixis has several forms including pair‐looped and micronuclear types (e.g., donor‐recipient and chained) (Figure ) as well as direct internuclear bridges (Mursalimov et al, ; Kravets et al, ; Sidorchuk et al, ). These variations of the behaviour can occur within a single population of microsporocytes and can happen sequentially or simultaneously, with pair‐looped and donor‐recipient interactions more typical of spontaneous cytomixis (Kravets et al, ), whereas chained interactions tend to be induced (Sidorchuk et al, ). Structurally, cytomixis is a part of the early‐prophase meiotic chromosome transformations, whereas functionally, we suppose, of DNA monitoring, homologous recombination and DNA repair (unpublished data).…”

Section: Structural Elements Of Cytomixismentioning

confidence: 99%

“…Cytomixis can be local (in the cross section of anther) or trans-tissue, in a longitudinal direction (Grodzinsky et al, 1996;Shamina et al, 2000;Kwiatkowska, 2003;Peng et al, 2003;Mursalimov et al, 2010;Kravets, 2013). The vectoral character of cytomixis is also suggested by complex forms of collective cytomictic behavior has been found in the anthers of monocots (Kravets et al, 2016). While a cooperating behavior prevails among microsporocytes, in microsporocytes and tapetal cells there appears to be a competitive relationship.…”

Section: Peculiarities Of Nuclear Interactions and Nuclear Translocationmentioning

confidence: 99%

“…Polyploid tapetum nuclei are powerful acceptors that are able to compete with microsporocytes and guide the chromatin translocation to their favor. Competitive relationships likely reflect the intensification of competition for area between somatic and generative tissues during anther differentiation (Kravets et al, ).…”

Section: Peculiarities Of Nuclear Interactions and Nuclear Translocationmentioning

confidence: 99%

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Cytoskeleton and nucleoskeleton involvement in processes of cytomixis in plants

Kravets

Yemets

Blume

2017

Cell Biology International

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Cytomixis is a form of cell-to-cell nuclear migration that involves the interaction of dynamic cytoskeletal components with the nucleus through signalling systems and linker complexes. In cytomixis two known mechanisms can be involved: actomyosin and/or microtubules and their associated motors. Perinuclear actin anchors and determines the direction of nuclear movement. In microsporogenesis cytomixis is probably initiated by a cascade of signals that trigger prophase reorganization of nucleus and cytoskeleton, and is a result of cytoskeletal protein activation, as well as a weakening of mechanisms responsible for anchoring the nucleus. The interactions between nuclei and the cytoskeleton are mediated by linker complexes that play a major role in nuclear positioning and shape, chromatin-nuclear envelope interactions, nucleoskeleton organization, gene expression and genome organization. Other contributing factors include changes in the protein composition and post-translational modifications that alter protein conformation. Cytomixis appears also to have relevance to higher order structuring, influencing tissue and organ architecture, causing collective forms of cell interactions and information exchange within a single continuum. In this review we summarize our current understanding of the cytoskeleton dynamic function in cytomictic nuclear migration.

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“…Цитомиксис у исследованных видов является спонтанным процессом межклеточного взаимодействия. В зиго-пахитене микроспорогенеза им охватывается значительная часть популяции микроспороцитов [10]. Подобный тип цитомиксиса с прямыми междуядерными взаимодействиями смежных поляризованных микроспороцитов мы охарактеризовали как парнопетельный.…”

Section: результаты и обсуждениеunclassified

Impact of cytomixis on the microspogenesis and formation of unreduced pollen grains in monocots

Kravets¹,

Plohovskaya²,

Horyunova³

et al. 2017

Fakt. eksp. evol. org.

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Aim. Despite significant progress in the investigation of cytomixis its functional role and effect on the course of meiosis as well as mechanisms of 2n pollen grains formation is still not completely clear. We have studied the destination of cytomictic chromatin as well the mechanisms of unreduced microspores formation in species of monocots with spontaneous cytomixis. Methods. Light and fluorescent microscopy. Results. The cytomictic chromatin forms additional meiotic chromosomes in the recipient microsporocytes. Many of these meiotic chromosomes undergo rearrangement and fragmentation but retain their bivalent organization. Conclusions. Cytogenetic anomalies of microsporogenesis caused by activation of cytomixis in prophase may reflect meiosis stabilization mechanisms by assimilation and adaptation or diminution and reutilization of the introduced DNA. The main mechanism of polyploidization of microsporocytes and pollen grains in studied monocots is the restitution of the first meiotic division via the formation of a meta-anaphase 1 block.Keywords: cytomixis, microsporogenesis, additional (recipient) chromosomes, meta-anaphase 1 block, Lilium croceum Chaix., Allium cepa L., Allium fistulosum L.

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Intra- and intertissular cytomictic interactions in the microsporogenesis of mono- and dicotyledonous plants

Cited by 11 publications

References 42 publications

Cytomixis as a primary form of sexual process

Cytomixis as a primary form of sexual process

Cytoskeleton and nucleoskeleton involvement in processes of cytomixis in plants

Impact of cytomixis on the microspogenesis and formation of unreduced pollen grains in monocots

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