Some Observations on the Wound Reactions of Ankyropteris corrugata
| العنوان: | Some Observations on the Wound Reactions of Ankyropteris corrugata |
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| المؤلفون: | H. S. Holden |
| المصدر: | Botanical Journal of the Linnean Society. 48:643-655 |
| بيانات النشر: | Oxford University Press (OUP), 1931. |
| سنة النشر: | 1931 |
| مصطلحات موضوعية: | Wound area, Cortical parenchyma, Tracheid, Xylem, Plant Science, Anatomy, Phloem, Biology, Meristem, Ecology, Evolution, Behavior and Systematics, Vascular tissue |
| الوصف: | Summary The tissues of the fossil fern Ankyropteris corrugata show well-marked reactions to wounding. In the root these, which consist of irregularly disposed wedges of meristematic tissue, are confined to the cortical parenchyma and may extend for some distance beyond the actual wound area. In the stem the wounds generally take the form of irregular cortical fissures. These are bordered on either side by a strip of meristem four to eight cells in depth. Anomalous secondary xylem which occurs in a stem in the neighbourhood of a bifurcation is also considered to be due probably to traumatic stimulus. In the petiole the wound reaction varies. Where the wound is superficial a pad of healing meristem is developed from the cortical cells. The parenchymatous cells are most active, but the sclerenchymatous cells may also undergo division. Exceptionally the superficial cells may be modified in a similar way to those of the normal epidermis, thus providing an example of “restitution.” Other wounds, termed “crush” wounds, are characterised by irregular cortical fissures. These become bordered or surrounded by a strip of meristematic cambiform cells. Where the wounds are deep-seated the vascular tissues may be involved in the reaction. The reaction in such cases takes the form of the development of secondary tracheids, usually short and of small calibre, which vary in position with that of the wound. There is some evidence that the phloem or phloem-parenchyma may also become meristematic under these conditions. I am much indebted to Dr. D. H. Scott, F.R.S., for his kindly interest during this investigation. Acknowledgments are also due to the Keeper of the Department of Geology, British Museum (Natural History), and to Prof. M. Drummond of Glasgow University for facilities for studying the fossil plants in their respective departments. The expenses incurred in this study have been met in part by a grant from the Royal Society. |
| تدمد: | 1095-8339 0024-4074 |
| DOI: | 10.1111/j.1095-8339.1931.tb00597.x |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::9eaa25e9069f4ffe0cd50bd95df7e3cd https://doi.org/10.1111/j.1095-8339.1931.tb00597.x |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........9eaa25e9069f4ffe0cd50bd95df7e3cd |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10958339 00244074 |
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| DOI: | 10.1111/j.1095-8339.1931.tb00597.x |