Branching Mutant rms-2 in Pisum sativum (Grafting Studies and Endogenous Indole-3-Acetic Acid Levels).

摘要: Isogenic lines of pea (Pisum sativum L.) were used to determine the physiological site action Rms-2 gene, which maintains apical dominance, and its effect on endogenous free indole-3-acetic acid (IAA) levels. In mutant rms-2 scions, normally produce lateral branches below node 3 above 7, dominance was almost fully restored by grafting (wild-type) stocks. reciprocal grafts, stocks did not promote branching in wild-type shoots. Together, these results suggest that gene inhibits shoot controlling synthesis a translocatable (hormone-like) substance is produced roots and/or cotyledons shoot. At all stages, including stage at aerial buds commence outgrowth, level IAA shoots elevated (up 5-fold) comparison with The internode length plants 40% less than plants, allocated significantly more dry weight root plants. Grafting normalize levels or even though it inhibited branching, suggesting involvement control may be confined processes