Effect of daylength on the flower bud differentiation and development in coriander (Coriandrum sativum L.)
2001
Tomitaka, Y. (Tokyo Univ. of Agriculture (Japan)) | Karimata, A. | Noguchi, A.
This study examined the influence of daylength on the flower bud differentiation and development of coriander. Daylength of 8, 12, 14, 16-h and natural daylength were afforded the plants. The plant height of longer daylength was greater, while daylength had little influence on the number of leaves. The number of days from sowing to flower bud differentiation was the smallest for the 16-h daylength (49 days) and the greatest for the 8-h daylength (73 days). On the other hand, the longer the daylength, the smaller the number of days from flower bud differentiation to flowering. The number of expanded leaves was smaller for longer daylength. Flower bud differentiation was observed even in the 8-h daylength, although it was earlier in the longer daylength. Therefore, coriander can be regarded as a quantitative long day plant as regards the flower bud differentiation. The stage of flower bud development can be classified into the following nine stages: 1) vegetative stage; 2) predifferentiation stage ; 3) cluster differentiation stage ; 4) lateral cluster differentiation stage ; 5) early stage of floret formation ; 6) later stage of floret formation; 7) petal development stage ; 8) stamen development stage ; 9) carpel development stage.
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