Pod temperature, root temperature, soil iperature on growth, development, and seed compo-temperature sition ot peanut. Knowledge about how soil temperature affects pods and roots separately could provide useful information for field management and genetic manipu lation. To facilitate such investigations, a technique was developed which allows imposition of different tem perature 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 of28/22 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 hr and the transition to the 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 com partments) 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).
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