The effects of asymmetric calcium application on primary root curvature of ageotropum pea mutant.

Recent studies indicate that roots of ageotropum seedlings can be used to study the hydrotropic response of roots independent of physiological events related to the gravity response of roots. There is evidence that Ca2+ ions are important in both the gravitropic and hydrotropic response of roots. In this study, we have compared three fully graviresponsive pea cultivars and the ageotropum mutant with regard to: 1) general root anatomy, 2) the effects of unilateral Ca application to both the root cap and DEZ region on root curvature, and 4) effects of unilateral application of EGTA to the DEZ region.