Heterogeneity of nuclear DNA labelling from intact, wounded and virus-infected tobacco leaves

Gense, Marie-Thérèse

doi:10.1016/0045-6039(80)90016-0

Cited by 6 publications

(1 citation statement)

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“…Quantitative DNA variations can be caused by other environmental stimuli. One example of this is the DNA amplification which seems to follow stress caused by 205 YAOLA B A S S I recision of the tissues, as has been observed in Solanum tuberosum tuber tissues (Watanabe & Imaseki, 1973), in Nicotiana tabacum leaves (Gense, 1980), in Vicia fuba roots and in various other types of plants (see Bassi, in preparation). Analogous effects can follow treatment of plants with metals : for instance biochemical analysis carried out by separation of different fractions of 3zP-labelled D N A by chromatography on a column containing methylated-albumin-kieselguhr (MAK), demonstrated synthesis of metabolically labile D N A in aluminium-treated roots of Hordeum vulgare (Sampson et al, 1965).…”

Section: Phaseolus Vulgarismentioning

confidence: 92%

Quantitative Variations of Nuclear Dna During Plant Development: A Critical Analysis

Bassi

1990

Biological Reviews

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SUMMARY In this review a critical analysis is made of the quantitative DNA variations that take place during plant development. These include underreplication, loss and amplification of repeated sequences; particular attention is devoted to quantitative variations of non‐coding DNA sequences. Examples reported in the literature are analysed in relation to the different biological phenomena they accompany such as vegetative development, phase changes, senescence, dedifferentiation or tumour formation. The author also considers the influence that external elements such as growth factors, chemical substances, culture medium composition, or, also, different stimuli of environmental character, can have on these quantitative variations of nuclear DNA sequences. Finally the different hypotheses on the role that repetitive DNA sequences (particularly those that are highly repeated) can have on the life of the cell are analysed and discussed. The experimental evidence, although fragmentary and sometimes contradictory, leads to the conclusion that the plant genome is not so ‘quantitatively static’ as was once hought, but is instead characterized by a dynamic plasticity; the role of repeated DNA sequences in the plant development seems to be much more active, than the role hypothesized by many authors in the past.

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Section: Phaseolus Vulgarismentioning

confidence: 92%