A Technique for Imposing Separate Temperature Regimes on Pods and Roots of Peanut (Arachis hypogaeaL.)1 uri icon


  • Recent studies have shown marked effects of soil temperature on growth, development, and seed composition of peanut. Knowledge about how soil temperature affects pods and roots separately could provide useful information for field management and genetic manipulation. To facilitate such investigations, a technique was developed which allows imposition of different temperature regimes to the pods and the roots separately. Pods and roots were grown in different compartments that have soil temperature controlled by separate water baths. Day/night temperature regimes of 28/22 and 40/34 C with a 12-hr ?day? and 12-hr ?night? period were imposed to the pod and root compartments separately in all four possible combinations of these temperature regimes. The temperature change between the ?day? and ?night? period occured mainly within the first 2 brand the transition to tbe final temperature required up to 5 hr. After adjustment to the ?day? or ?night? temperatures, the temperatures ranged in the 40/34 C treatment between the programmed temperature and 0.6 C less (root compartments) or 0.8 C less (pod compartments); and the maximal fluctuation in the 28/22 C treatment is ± 0.3 C (root compartments) or ± 0.6 C (pod compartments)

publication date

  • 1996