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Some aspects of tissue water relations in cassava plant (Manihot esculenta Crantz) and their ecological interpretation
| Content Provider | Consultative Group on International Agricultural Research (CGIAR) |
|---|---|
| Author | Palta, J.A. |
| Description | Two expt. were conducted to: (1) examine the application and other implications of the pressure/vol. technique (P/V) in the study of water stress in the cassava plant and (2) determine the relation of the water content in the tissue and its water potential. The P/V technique was used with branches of var. M Col 22 and M Mex 59 to determine the characteristics of water relations. Among the observations noted the following are found: the lack of considerable differences between the values of the relation between dry wt. and turgid wt. for stressed and unstressed leaves of the 2 cassava var. suggest that the amount of water in cell walls is closely related to the different proportions of the macromolecules (hemicellulose and pectic substances), rather than the thickness of the cell wall. The lowest and slowest decreases of the water content in the cell wall in M Col 22 (3.5 percent) compared to M Mex 59 (30 percent) suggests that the regulator capacity of the cell wall in M Col 22 may be an indicative factor of acclimatization to drought. On the hand, a higher intra-var. variation is indicated instead of a variation between the 2 var.The ability of the leaves of both var. studied is associated with the recovery of leaf area diminished under stress conditions. (CIAT) Se realizaron 2 expt. para: 1) examinar la aplicacion y otras implicaciones de la tecnica de presion/vol. (P/V) en el estudio del estres de agua en la planta de yuca y 2) determinar la relacion del contenido de agua en el tejido y su potencial hidrico. Se utilizo la tecnica de P/V con ramas de las var. M Col 22 y M Mex 59 para determinar las caracteristicas de las relaciones hidricas. Entre las observaciones efectuadas se encuentran: la falta de diferencias considerables entre los valores de la relacion entre el peso seco y el peso turgido para las hojas bajo estres y sin estres de las 2 var. de yuca, sugiere que la cantidad de agua en las paredes celulares se relaciona estrechamente con las diferentes proporciones de las macromoleculas (hemicelulosa y substancias pecticas), mas que con el grosor de la pared celular. Las disminuciones menores y mas lentas del contenido de agua en la pared celular de M Col 22 (3.5 por ciento) en comparacion con M Mex 59 (30 por ciento) sugieren que la capacidad de regulacion de la pared en M Col 22 puede constituir un factor indicativo de aclimatizacion a la sequia. Se sugiere por otra parte una mayor variacion intra-var. en vez de una variacion entre las 2 var. La habilidad de las hojas en ambas var. estudiadas se relaciona con la recuperacion del area foliar, la cual se disminuyo en condiciones de estres. (CIAT) |
| Related Links | https://cgspace.cgiar.org/items/54447a17-c550-4223-8917-d734bbbaafcf |
| File Format | |
| Language | English |
| Publisher | International Center for Tropical Agriculture Programa de Yuca |
| Publisher Date | 1980-01-01 |
| Publisher Place | Cali, Colombia |
| Access Restriction | Open |
| Subject Keyword | Manihot Esculenta Branching Cultivars Cultivation Starch Crops Water Requirements Water Stress Developmental Stages Cassava Water |
| Content Type | Text |
| Resource Type | Chapter |
| Subject | Agronomy and Crop Science Food Science Plant Science |
