Pre-harvest berry shrinkage in cv ‘Shiraz’ (Vitis vinifera L.): Understanding sap flow by means of tracing
| Autor: | Antonio Carlomagno, J.J. Hunter, Claudio Lovisolo, Vittorino Novello, Alessandra Ferrandino, Andrea Genre |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Vine Véraison Xylem Ripening 04 agricultural and veterinary sciences Berry Horticulture Biology Phloem 01 natural sciences Phloematic tracer Xylematic tracer 040501 horticulture Veraison Pedicel Berry shrivel Phloem Phloematic tracer Véraison Xylem Xylematic tracer Berry maturity Berry maturity 0405 other agricultural sciences Vitis vinifera Berry shrivel 010606 plant biology & botany |
| Popis: | The berry shrinking phenomenon in cv Shiraz (Vitis vinifera L.) is to date much debated. Currently, the critical points in Shiraz pre-harvest shrinkage are: a) the role of the xylem during post-veraison; b) the existence and timing of xylematic back flow and c) the functionality of the phloem. In order to try to resolve these issues, we traced the xylematic flows from the vine to the berry and vice versa by using the fuchsin acid as a xylematic tracer. At berry maturity, in order to verify also the phloematic functionality, we used the fluorescent tracer 6(5)-carboxyfluorescein diacetate (CFDA). The results showed clearly that the vine gradually loses the ability to deliver water to the berries via pedicel during ripening. The xylematic back-flow is active in the pre-veraison but not in the post-veraison berries. Furthermore, the CFDA experiments showed the absence of flow from the plant to the berry and vice versa at berry maturity. In cv Shiraz veraison seems to be the crucial point in the berry dehydration understanding: in pre-veraison there is a ‘plant/berry’ and ‘berry/plant’ water communication, whereas in post-veraison this seems to cease progressively. |
| Databáze: | OpenAIRE |
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