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- Title
Environmental effects on the early stages of tassel morphogenesis in maize (Zea mays L.).
- Authors
Bechoux., Nadia; Bechoux, N.; Bernier, G.; Lejeune, P.
- Abstract
ABSTRACTThe effects of various environmental conditions on the initiation of tassel branches (NTB) and spikelet-pairs (NSP) were examined in the stress-sensitive maize inbred F53. Chilling induced the most important effect, with a dramatic decrease in both NTB and NSP, provided it was applied at the end of the vegetative phase and start of the floral transition phase. The primary cause of chilling-induced abortion of the tassel branches could be oxidative stress in the leaves, since lowering light irradiance during chilling greatly reduced the effect of cold. The comparison of inbreds F53 and F2 revealed that both genotypes exhibited a similar period of cold sensitivity at the floral transition phase, although F2 was considered from field observations as a stress-insensitive genotype (at least for tassel development). However, our results also showed a chilling acclimation response in inbred F2 but not in inbred F53. The similarities with the work by Lejeune & Bernier (1996 Plant, Cell and Environment 19, 217–224.) concerning the effect of chilling on ear initiation in the sensitive inbred, B22, are emphasized.
- Subjects
CORN morphogenesis; CORN flowering; EFFECT of climate on corn
- Publication
Plant, Cell & Environment, 2000, Vol 23, Issue 1, p91
- ISSN
0140-7791
- Publication type
Article
- DOI
10.1046/j.1365-3040.2000.00515.x