| dc.creator | PEÑA-VALDIVIA,CECILIA B | |
| dc.creator | SÁNCHEZ-URDANETA,ADRIANA B | |
| dc.date | 2009-01-01 | |
| dc.date.accessioned | 2017-03-07T16:15:25Z | |
| dc.date.available | 2017-03-07T16:15:25Z | |
| dc.identifier | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200013 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/398628 | |
| dc.description | The objective of this study was to test the hypothesis that root of maguey (Agave salmiana Otto ex Salm-Dyck) seedlings reacts during the first 24 h to low substrate water potential (Yw), by anatomical modifications. Three-4 cm root length seedlings were planted in vermiculite for 24 h at Yw between -0.03 and -2.35 MPa. Root dimensions, proline content and anatomy were evaluated. Substrate ψw between -0.65 and -2.35 MPa did not significantly affect longitudinal root growth. However, proline content significantly increased from 1.6 to 2.1 emoles mg-1. Significant reductions of transverse root area (41 %), thickness of mucilage covering the epidermis (47 %), thickness of epidermis (between 15 and 46 %), area of the parenchyma (between 35 and 41 %) and number of vessels (up to 28 %) were observed with Yw of -2.35 MPa. In contrast, thickness of xylem wall, diameter of xylem vessels and the number of cells of the cortex of the differentiation root region significantly increased (64, 17, and 97 %, respectively). The anatomical changes associated with low substrate Yw indicate a net increase of root apoplatic paths; structures involved in water conduction increased their diameter under low substrate Yw conditions and anatomical changes occurred during the first 24 h of water stress. | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Sociedad de Biología de Chile | |
| dc.source | Biological Research v.42 n.2 2009 | |
| dc.subject | Maguey | |
| dc.subject | proline | |
| dc.subject | root anatomy | |
| dc.subject | root growth | |
| dc.subject | water deficit | |
| dc.subject | water stress | |
| dc.title | Effects of substrate water potential in root growth of Agave salmiana Otto ex Salm-Dyck seedlings | |
| dc.type | Artículos de revistas | |
