Resumo

UNIGARRO MUNOZ, Carlos Andrés  e  VICTORIA KAFURE, Jorge Ignacio. Evaluation of aerenchyma radical area in sugar cane (saccharum spp.) as feature of tolerance to hypoxia. Acta Agron. [online]. 2013, vol.62, n.3, pp.223-231. ISSN 0120-2812.

The research was developed at the experiment station San Antonio (EESA) of Cenicaña located in the village of San Antonio de los Caballeros (Florida, Cauca Valley). Two experiments were conducted one on semi-dry conditions and another on wet conditions, each one with a design of a randomized complete block with three replications. The aerenchyma observed in the fibrous roots of 13 varieties of sugarcane was evaluated (Saccharum spp) by 4, 6 and 8 months after planting. Agronomic variables as height, diameter, population, stalk weight of total plot, sucrose (% cane) and yield of sucrose per plot were evaluated at harvesting time. It was found that there was a differential response between environments because of the lack of oxygen (hypoxia) in soil. On wet conditions, the aerenchyma occupied 55% of the total area in the root tissues although did not show statistical differences between varieties, whereas the opposite occurred on semi-dry conditions where only occupied 33%. The aerenchyma was not associated with any agronomic traits evaluated. The variety CC 01-1884 had the best agronomic performance in the evaluations.

Palavras-chave : Drought stress; fibrous roots; flooding stress; soil waterlogging; sugarcane.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )