The ultrastructure of the development of Tillandsia (Bromeliaceae) trichome

Papini, Alessio; Tani, Gabriele; Falco, Pietro Di; Brighigna, Luigi

doi:10.1016/j.flora.2009.02.001

Cited by 74 publications

(42 citation statements)

References 38 publications

(32 reference statements)

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“…The many ribosomes, both free and associated within the ER, are likely involved in producing lytic enzymes. The dead cells often showed traces of partially lysed, osmiophilic cytoplasm and nuclei, hallmarks of PCD in plants (Brighigna et al, 2006;Papini et al, 1999Papini et al, , 2010cPapini et al, , 2011. At maturity, these dead cells are characterized by their walls, which possess a loose and filamentous matrix.…”

Section: Superficial and Spongy Tissuesmentioning

confidence: 99%

The unusual tegumental tissues of the Lunaria annua (Brassicaceae) seed: A developmental study using light and electron microscopy

Mosti

Friedman

Piccolin

et al. 2012

Flora - Morphology, Distribution, Functional Ecology of Plants

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Please cite this article in press as: Mosti, S., et al., The unusual tegumental tissues of the Lunaria annua (Brassicaceae) seed: A developmental study using light and electron microscopy. Flora (2012) With light, fluorescence, transmission electron, and environmental scanning electron microscopy we studied the development of the Lunaria annua L. (Brassicaceae) seeds in order to reveal basic anatomical information about the unusual tissues of these seeds. In particular the seed tegument tissues possess complex morphological aspects that are relevant to the biology and ecology of this plant. A sclerenchymatic tissue as the innermost layer of the teguments apparently offers robust protection for the embryo, yet is organized to be flexible. This tissue likely controls the passage of water from the tegumental layers towards the embryo. We report here the presence of tannins in the pre-sclerenchymatic layer of the unripe seed. The inner tegument also houses a spongy tissue with wide intercellular spaces. This tissue could impart buoyancy to the seeds, which possibly might be required for water transport. The structural features could indicate that Lunaria may have evolved in a Mediterranean environment, which is characterized by a long dry season, but with a large amount of rainfall concentrated in short periods. Probably, not only the typical enlarged and flattened fruits of Lunaria can easily float and be dispersed away from the mother plant, but also the seeds have this dispersal peculiarity after release from the silicules.

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Section: Superficial and Spongy Tissuesmentioning

confidence: 99%

The unusual tegumental tissues of the Lunaria annua (Brassicaceae) seed: A developmental study using light and electron microscopy

Mosti

Friedman

Piccolin

et al. 2012

Flora - Morphology, Distribution, Functional Ecology of Plants

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“…According to these authors, these dead cells perform capillary action, storing water in their lumens, which then comes into contact with the leaf surface. Papini et al (2010) studied the development of trichomes in Tillandsia aeranthos (Loiseleur) L.B.Sm. with the use of Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM).…”

Section: Discussionmentioning

confidence: 99%

Are the wing's cells alive? Study case in Vriesea trichomes

et al. 2016

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The presence of peltate foliar trichomes is one of the main anatomical characteristic of Bromeliaceae. These complex structures are adapted to compensate water and nutrient absorption in species that have reduced or substrate and light-reflection independent roots. They have enabled species' survival in diverse and extreme environments contributing to the wide distribution of this family. In the present work, we analyzed the peltate trichomes' characteristics in three taxa of Vriesea (Tillandsioideae): Vriesea platynema var. platynema, V. platynema var. variegata and V. tijucana. Leaves in different developmental stages were analyzed with histochemical tests and Transmission Electron Microscopy. Main results include the presence of cytoplasmic content in the wing peripheral cells, as well as in mature leaves. This is the first register of the presence of such feature in this family, which brings the possibility of discussing how water can be absorbed by these cells. Key words: Anatomy, Tillandsioideae, absorptive trichomes. ResumoUma das principais características anatômicas de Bromeliaceae é a presença de tricomas foliares peltados. Estas complexas estruturas adaptadas à compensação da absorção de água e alimento em espécies com raízes reduzidas ou independentes do substrato e reflexão da luz, possibilitaram a vida em ambientes diversos e extremos, contribuindo para a ampla distribuição desta família. Neste estudo são analisadas as características dos tricomas peltados de três espécies do gênero Vriesea (Tillandsioideae): Vriesea platynema var. platynema, V. platynema var. variegata e V. tijucana. Folhas em diferentes fases de desenvolvimento foram analisadas com testes histoquímicos e de Microscopia Eletrônica de Transmissão. Destacam-se a presença de citoplasma evidente em células periféricas da ala, inclusive em folhas maduras, característica esta, inédita evidenciada pela primeira vez para a família, possibilitando a discussão da absorção de água por estas células. Palavras-chave: Anatomia, Tillandsioideae, tricomas absorventes. Are the wing's cells alive? Study case in Vriesea trichomesAs células da ala são vivas? Estudo de caso em tricomas de Vriesea

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“…Some workers observed it in diploids (Sapre 1978), others showed it in genetically unbalanced plants (Salesses 1970;Mantu and Sharma 1983) and some observed it more frequently in polyploids (Semyarkhina and Kuptsou 1974). Cytomixis has been described in meiocytes; however, Papini et al (2010) reported intercellular channels in somatic cells of plants for the first time. There are various views regarding the occurrence of cytomixis.…”

Section: Discussionmentioning

confidence: 99%

Consequences of colchicine induced intermeiocyte connections inHelianthus annuus

Gautam

Kumar

2013

Caryologia

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During microsporogenesis sometimes the chromatin materials migrate from one cell to another by intermeiocyte connections. In the present study, during induction of tetraploidy in sunflower, changes in the normal behaviour of chromosomes was detected. Besides chromosomal aberrations, cytomictic connections were frequently recorded. Cytomixis has been reported by many researchers in many diploid or tetraploid plants. In sunflower, cytomixis in colchiploids has not been recorded. In the current study high numbers of cytoplasmic connections were observed in the plants failing to reach higher ploidy level. Formation of cytoplasmic connections was very high, leading to many hyperploids, hypoploids and even empty pollen mother cells (PMCs). Cytomixis occurred frequently, with two to many meiocytes engaged in exchange of chromatin through one or multiple cytoplasmic connections. Few rare polyploid PMCs with cytoplasmic connections were observed, which favours formation of aneuploids and polyploids. Besides various chromosomal anomalies, fertility was also significantly affected. This work envisages the possibility that although polyploidy was not achieved in some plants there is tendency to form higher ploidy levels in this species. This illustrates the potential for formation of various genetic combinations and thus novel traits. Cytomixis is also an additional source of male sterility in sunflower and thus requires intense research.

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The ultrastructure of the development of Tillandsia (Bromeliaceae) trichome

Cited by 74 publications

References 38 publications

The unusual tegumental tissues of the Lunaria annua (Brassicaceae) seed: A developmental study using light and electron microscopy

The unusual tegumental tissues of the Lunaria annua (Brassicaceae) seed: A developmental study using light and electron microscopy

Are the wing's cells alive? Study case in Vriesea trichomes

Consequences of colchicine induced intermeiocyte connections inHelianthus annuus

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