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Báo cáo khoa học: " The effect of sucrose on the development of hybrid walnut microcuttings (Juglans nigra x Juglans regia). Consequences on their survival during acclimatization"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài:" The effect of sucrose on the development of hybrid walnut microcuttings (Juglans nigra x Juglans regia). Consequences on their survival during acclimatization. | Ann Sci For 1995 52 147-156 Elsevier INRA 147 Original article The effect of sucrose on the development of hybrid walnut microcuttings Juglans nigra X Juglans regia . Consequences on their survival during acclimatization D Chenevard 1 c Jay-Allemand 2 M Gendraud 1 JS Frossard 1 Unite associée Bioclimatologie-PIAF INRA - université Blaise-Pascal domaine de Crouelle 63039 Clermont-Ferrand cedex 02 2INRA station d amelioration des arbres forestiers 45160 Ardon France Received 28 October 1993 accepted 5 August 1994 Summary We studied the effect of sucrose concentration in the root-development medium on the formation of adventitious roots and survival of microcuttings during acclimatization in 2 interspecific hybrid walnut Juglans nigra n 23 X J regia clones. Sucrose increased the rooting percentage fig 1 the number of adventitious roots fig 2A and the dry-matter content table I per rooted shoot. These effects were due to the energy properties of sucrose rather than to its osmotic function. High sucrose concentrations in the root-development medium 20 g H resulted in a high soluble carbohydrate content in the plantlets fig 3 mainly located in roots and callus. The 2 clones showed different capacities in rooting and growth. Survival of microcuttings during acclimatization was not directly influenced by the sucrose concentration fig 5 but was correlated with the number of adventitious roots fig 6A as well as with the number of leaves fig 6B present at the time of transfer to the growth chamber for each individual plant. walnut I rooting sucrose I micropropagation acclimatization survival Resume Role du saccharose sur le développement des microboutures de noyers hybrides Juglans nigra X Juglans regia . Consequences sur leur taux de survie en acclimatation. Nous avons étudié I effet de la concentration en saccharose dans le milieu de développement racinaire sur la formation de racines adventives et la survie de 2 clones d hybrides interspecifiques de noyer Juglans nigra 23