Size correlations among cambial initials and their derivatives in Polyalthia longifolia Thw.
The length and breadth of the cambial initials and their derivatives have been examined in Polyalthia longifolia, a tropical tree possessing non-storied cambium. Taking the average size of the initials and the elements originating from them, most of the sieve-tube elements have been found to be slig...
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| Format: | Article |
| Language: | English |
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Polish Botanical Society
2015-01-01
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| Series: | Acta Societatis Botanicorum Poloniae |
| Online Access: | https://pbsociety.org.pl/journals/index.php/asbp/article/view/4854 |
| _version_ | 1818034112357728256 |
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| author | D. D. Sharma H. K. Sharma G. S. Paliwal |
| author_facet | D. D. Sharma H. K. Sharma G. S. Paliwal |
| author_sort | D. D. Sharma |
| collection | DOAJ |
| description | The length and breadth of the cambial initials and their derivatives have been examined in Polyalthia longifolia, a tropical tree possessing non-storied cambium. Taking the average size of the initials and the elements originating from them, most of the sieve-tube elements have been found to be slightly shorter in length than the fusiform initials. On the other hand, a few of these are still shorter - almost half of the fusiform initials, due to transverse or somewhat oblique divisions in the sieve element mother cells. The vessel elements are slightly shorter but 5-6 times wider than the fusiform initials. The parenchyma strands, in phloem comprising cells storing starch or tannin (pps), in xylem accumulating starch only (ssps), are more or less equal to fusiform initials indicating that the xylem and phloem mother cells forming parenchyma cells have not undergone any major change except for transverse divisions. The individual vessel-associated parenchyma cells (v.a.p. cells) are wider but much shorter in length as compared to the starch-storing parenchyma cells (s.s.p. cells) indicating that more transverse divisions have occured in the strands of the former than those of the latter. Among all the cambial derivatives, the fibers exhibit maximum increase in length, due to intrusive growth. The ray parenchyma cells are slightly longer than the ray initials possibly due to the elongation of these initials during their transformation into vascular ray cells. |
| first_indexed | 2024-12-10T06:33:59Z |
| format | Article |
| id | doaj.art-5083aeea0db7469dbf6dbed4646b4d13 |
| institution | Directory Open Access Journal |
| issn | 2083-9480 |
| language | English |
| last_indexed | 2024-12-10T06:33:59Z |
| publishDate | 2015-01-01 |
| publisher | Polish Botanical Society |
| record_format | Article |
| series | Acta Societatis Botanicorum Poloniae |
| spelling | doaj.art-5083aeea0db7469dbf6dbed4646b4d132022-12-22T01:58:59ZengPolish Botanical SocietyActa Societatis Botanicorum Poloniae2083-94802015-01-01481939810.5586/asbp.1979.0084057Size correlations among cambial initials and their derivatives in Polyalthia longifolia Thw.D. D. Sharma0H. K. Sharma1G. S. Paliwal2University of DelhiUniversity of DelhiUniversity of DelhiThe length and breadth of the cambial initials and their derivatives have been examined in Polyalthia longifolia, a tropical tree possessing non-storied cambium. Taking the average size of the initials and the elements originating from them, most of the sieve-tube elements have been found to be slightly shorter in length than the fusiform initials. On the other hand, a few of these are still shorter - almost half of the fusiform initials, due to transverse or somewhat oblique divisions in the sieve element mother cells. The vessel elements are slightly shorter but 5-6 times wider than the fusiform initials. The parenchyma strands, in phloem comprising cells storing starch or tannin (pps), in xylem accumulating starch only (ssps), are more or less equal to fusiform initials indicating that the xylem and phloem mother cells forming parenchyma cells have not undergone any major change except for transverse divisions. The individual vessel-associated parenchyma cells (v.a.p. cells) are wider but much shorter in length as compared to the starch-storing parenchyma cells (s.s.p. cells) indicating that more transverse divisions have occured in the strands of the former than those of the latter. Among all the cambial derivatives, the fibers exhibit maximum increase in length, due to intrusive growth. The ray parenchyma cells are slightly longer than the ray initials possibly due to the elongation of these initials during their transformation into vascular ray cells.https://pbsociety.org.pl/journals/index.php/asbp/article/view/4854 |
| spellingShingle | D. D. Sharma H. K. Sharma G. S. Paliwal Size correlations among cambial initials and their derivatives in Polyalthia longifolia Thw. Acta Societatis Botanicorum Poloniae |
| title | Size correlations among cambial initials and their derivatives in Polyalthia longifolia Thw. |
| title_full | Size correlations among cambial initials and their derivatives in Polyalthia longifolia Thw. |
| title_fullStr | Size correlations among cambial initials and their derivatives in Polyalthia longifolia Thw. |
| title_full_unstemmed | Size correlations among cambial initials and their derivatives in Polyalthia longifolia Thw. |
| title_short | Size correlations among cambial initials and their derivatives in Polyalthia longifolia Thw. |
| title_sort | size correlations among cambial initials and their derivatives in polyalthia longifolia thw |
| url | https://pbsociety.org.pl/journals/index.php/asbp/article/view/4854 |
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