Revista Chapingo Serie Horticultura
Universidad Autónoma Chapingo
Declaración de privacidad

 
 

 

 

 
Vol.5, núm.Esp - 1999
play_arrow

ECOPHYSIOLOGY OF THE AVOCADO (Persea Americana MilI.) TREE AS A BASIS FOR PRE-HARVEST MANAGEMENT
ECOPHYSIOLOGY OF THE AVOCADO (Persea Americana MilI.) TREE AS A BASIS FOR PRE-HARVEST MANAGEMENT

B. Nigel-Wolstenholme; A.W. Whiley

http://dx.doi.org/10.5154/r.rchsh.1999.06.043

Recibido: 0000-00-00

Aceptado: 0000-00-00

Fecha de publicación en línea: 2016-07-01 /pág.77-88

 

picture_as_pdfDownload open_in_newExport citation cloudxml
  • descriptionAbstract

    In spite of seleetion for thousands of years, the avocado is still a poorly domesticated tree in the early stages of adaptation to an orehard environment. Cultivars based on Guatemalan and Mexican germplasm, for the subtropics and Mediterranean elimates, have only been available since the 1920's, and even in the best growing conditions the yield barrier of 30 t.ha-1 is hard to breaeh. Tropical "West Indian" (Iowland) avocado eultivars and produetion teehnology is less well developed. Orehard performance is therefore still largely influenced by evolutionary hangovers and constraints. For "subtropical" types, we have to deal with the residual survival strategies of a late-successional, K-seleeted, small-gap colonizing mountain eloud forest tree. These inelude potentially vigorous vegetative growth in flushes, counter-produetive to flowering and fruiting; delayed and typically irregular (mast) fruiting; unnecessarily profuse flowering in late'winter synchronized by winter cold and drought; short-lived shade-adapted leaves bome in creasingly further from the trunk on the tree periphery; energy-expensive fruits for large dispersal agents, hence the exhaustive nature of eropping on reserves, espeeially in large trees; and the tree's strategy to effieiently hoard, store and recyele carbohydrate and mineral reserves (hence "mineral-eheap" fruiting). Physiological attributes inelude potentially rapid C assimilation, but reduced photosynthesis under shade, water of Phytophthora stress; reasonable drought tolerance which however is at the expense of C assimilation and leaf effieiency; and the poorly researehed dependence on perseitol rather than sucrose as the main translocation sugar. Manipulation implications center around canopy/tree size/light management and the alleviation of stress at criticar times, to optimize C gain and allocation to fruiting on a sustainable basis. The prime need remains breeding for more manageable seion and rootstock combinations.

    Keyworks: Persea americana, evolutionary ecophysiology, management strategies

  • beenhereReferences
      No disponibles por el momento
  • starCite article

    Nigel-Wolstenholme, B., &  Whiley, A. (1999).  ECOPHYSIOLOGY OF THE AVOCADO (Persea Americana MilI.) TREE AS A BASIS FOR PRE-HARVEST MANAGEMENT. , 5(Esp), 77-88. http://dx.doi.org/10.5154/r.rchsh.1999.06.043

Indexed in







Submission

Licencia Creative Commons

SCImago Journal & Country Rank