| Journal: | Bosque (Valdivia) |
| Database: | PERIÓDICA |
| System number: | 000451502 |
| ISSN: | 0304-8799 |
| Authors: | Liu, Yang1 Sun, Meng2 Zhao, Shuang3 Qi, Guohui1 Zhang, Xuemei1 Guo, Suping1 |
| Institutions: | 1Hebei Agricultural University, College of Forestry, Hebei. China 2Henan Academy of Forestry Sciences, Zhengzhou, Henan. China 3Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang, Hebei. China |
| Year: | 2020 |
| Volumen: | 41 |
| Number: | 2 |
| Pages: | 193-201 |
| Country: | Chile |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental, analítico |
| Spanish abstract | Para revelar pautas regulares de transporte de agua en brotes frutales de nogal (Juglans regia), se observaron vías de transporte de agua de diversos órganos mediante rastreo de tintes; se determinó: potencial hídrico, estado del agua y tasa de transporte de agua de cada órgano. El potencial hídrico en el pedicelo, peciolo, brote lateral y brote principal fue de -2,59, -2,85, -1,68 y -0,37 MPa, respectivamente. El estado del agua mostró diferencias significativas entre los órganos. La relación entre el agua ligada y el agua libre en el pecíolo fue la mayor (1,93 RBC), seguida por: brote principal, brote lateral y pedicelo. La velocidad de transporte de agua en el pecíolo fue la mayor (3,13 cm/min), seguida del brote lateral, pedicelo y brote principal. Pero la tasa de transporte de agua del brote principal fue la mayor y más alta que la suma de los otros tres órganos. El xilema del peciolo estuvo separado del brote principal; en su parte superior estuvo conectado al xilema del pedicelo y al brote lateral. Durante el período de endurecimiento de la cáscara del fruto, el colorante estuvo en el borde del haz vascular del fruto, pero no en el haz vascular central. No se encontró colorante en yemas principales ni accesorias, en cambio, solo se tiñó una pequeña parte del xilema entre la yema accesoria y el brote principal. Las vías de transporte de agua fueron diferentes para los distintos órganos. El transporte y distribución del agua en varios órganos fueron afectados por su potencial hídrico, la estructura de los tejidos y las necesidades de agua |
| English abstract | To reveal the regular patterns of water transport in fruit-bearing shoots of walnut (Juglans regia), water transport pathways for various organs were observed using dye-tracing technique; water potential, water status and water transport rate were determined for each of these organs. Water potential in the pedicel, petiole, lateral shoot and main shoot was -2.59, -2.85, -1.68 and -0.37 MPa, respectively. Significant differences were noted among various organs in terms of water status. The ratio of bound water to free water in the petiole was the highest (1.93 RBC), followed by the main shoot, lateral shoot and pedicel. Water transport speed in the petiole was the fastest (3.13 cm/min), followed by the lateral shoot, pedicel and main shoot. However, the water transport rate of the main shoot was the highest, and higher than the sum of the other three organs. The xylem in the petiole was separated from the main shoot; at the top of the main shoot, the xylem was divided into two parts, one of which was connected to the xylem of the pedicel and the other to the lateral shoot. During the shell-hardening period of fruits, the dye was found at the edge of the fruit vascular bundle, although, it was not at the central vascular bundle. No dye was found in the main and accessory buds, instead, only a small part of the xylem was dyed between the accessory bud and the main shoot. Water transport pathways were different for various organs. Thus, the transport and distribution of water in various organs was affected by their water potential, tissue structure and water requirement |
| Disciplines: | Biología |
| Keyword: | Fisiología vegetal, Juglans regia, Agua, Rastreo, Potencial hídrico, Xilema |
| Keyword: | Plant physiology, Juglans regia, Water, Tracing, Water potential, Xylem |
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