Hormones and root-shoot relationships in flooded plants — an analysis of methods and results

Jackson, Michael B.; Attwood, Paul A.; Brailsford, R. W.; Coupland, D.; Else, Mark A.; English, Philippa J.; Summers, Jacky E.

doi:10.1007/978-94-017-3101-0_32

Cited by 7 publications

(2 citation statements)

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“…This was supported by Sifton (1945 [25] ) who summarized the early literature reporting the presence and basic structure of this tissue. Considerable information is available concerning the ontogeny and the hormonal control of aerenchyma development in primary tissues (Justin and Armstrong, 1987 [14] ; Voesenek et al, 1992 [31] ; Jackson et al, 1994 [13] ; Voesenek and van der Veen, 1994 [32] ; Jackson and Armstrong, 1999 [12] ), however, there is a paucity of information regarding these processes in secondary tissues. The effects of flooding on secondary growth and the potential adaptive significance of this has also been poorly studied (Williams and Barber, 1961 [33] ; Jackson and Armstrong, 1999 [12] ).…”

Section: Introductionmentioning

confidence: 99%

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Shoot Responses of Six Lythraceae Species to Flooding

2001

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The large family Lythraceae has several genera and species that show tolerance to flooding; one species, Lythrum salicaria (purple loosestrife), is considered invasive in North American wetlands. It is not clear, however, which characteristic(s) contribute to the invasive nature of L. salicaria, but those that contribute to improved flood tolerance may be responsible. This study examined the response of the shoot system of several members of the Lythraceae, three Lythrum species (L. salicaria, L. hyssopifolia, L. alatum), Decodon verticillatum, Pleurophora anomala and Heimia myrticifolia, to flooding to determine if these species differ in their response in comparison to L. salicaria. All species, except L. hyssopifolia, responded to flooding by increasing total plant height. All species, except H. myrticifolia, formed a phellem of significantly wider diameter at the stem base of flooded plants compared to controls. This phellem consisted of alternating bands of small, isodiametric cells and radially elongated cells separated by large air lacunae forming a very specialized aerenchyma. The small cells had Casparian band‐like wall modifications and occasionally displayed modifications that included all cell wall surfaces. The development of extensive aerenchymatous phellem in flooded plants may increase the air space continuum from shoot to root in shoots that have undergone secondary growth. Given that these species displayed similar responses to flooding, the purported invasiveness of L. salicaria cannot be attributed to presence of any of the characteristics studied.

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Section: Introductionmentioning

confidence: 99%

“…Scanning electron microscopy of shoots from plants exposed to flooding. (12 ± 14) Transverse(12,13) and tangential longitudinal(14) sections of Decodon verticillatum phellem. Alternating bands of small, isodiametric cells (arrowheads) and radially elongated cells (double arrowheads) are present in the phellem.…”

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confidence: 99%