Fig. 9.

Translocation in maize during a prolonged water deficit beginning 10 d after pollination. (A) Translocation 7 d later and (B) 21 d later in the same plants. Open circles (○) = controls supplied with water; closed circles (•), water withheld. The experiment exposed an upper leaf to ¹⁴CO₂ and detected percentage of applied label arriving in the grain 24 h later. Plants were grown in the field at leaf water potentials similar to those in the present work. Data are from Jurgens et al. (1978) and were significantly different at the 5 % level for water deficit and at the 1 % level for harvest date.