MSI99P0556 | |
Julien, M. H. R. | |
The photoperiodic control of flowering in Saccharum | |
periodical article | |
1972 | |
Proc. int. Soc. Sug. Cane Technol. | |
14: 323-333 | |
EN | |
En | |
Flowering in 2 clones of Saccharum spontaneum and 1 clone of S. robustum was found to be controlled by photoperiod. In the 2 S. spontaneum clones the earliest stages of development, induction and initiation of inflorescence axis primordium, required intermediate days of about 12 hr, 30 min, while the subsequent stage - initiation of inflorescence branch primordia - had a short day response, with a critical photoperiod 13 hr. The final stages - initiation of spikelet primordia and growth - were quantitative short day responses with optimum photoperiods of 11 hr and 9 hr respectively. In the S. robustum clone all stages were short day responses with gradually shortening critical photoperiods from induction to growth. At all stages of development in the 3 clones the presence of young leaves was necessary for the perception of the photoperiodic stimulus. The effects of inductive short or intermediate day cycles could be annulled by night-break treatments; it was shown that red and green were the effective wavebands. It is clear that normal floral development in these Saccharum clones requires a precise sequence of photoperiods. The relevance of this for the manipulation of date of flowering in breeding material is discussed. | |
SUGARCANE FLOWERING PHOTOPERIODISM DEVELOPMENT PHYSIOLOGY | |
MAURITIUS | |
Sugarcane: Physiology | |
Physiology and development | |
1992-03-02 | |
En | |
Mauritius Sugar Industry Research Institute | |
LIB | |
CAT | |
PB |