STUDIES ON THE PRODUCTION OF CARROT SEEDS UNDER EGYPTIAN CONDITIONS
ABDALLA ABDEL-AZEZ GHONAME EL-SAYED;
Abstract
Two field experiments were carried out in 1997 and 1998 seasons at the Agricultural Experimental Station of the National Research Center (Shalakan) to study the effect of some treatments i.e. planting distances (10, 15 and 20cm), GA3 foliar application (cont., 0, 100, 150 and 200ppm) and cold storage at 5•c for 0, 30, 45 and 60 days, on the flowering characters, survival of plants, hormonal content, seed yield and seed quality of carrot plants (Daucus carota L.) cv. "Chantenay Red Cored".
The values of percentage of survival of plants significantly increased by increasing the planting distance to 20cm. while, it significantly reduced the seed stalk length. The increasing of planting distances had no significant effect on the date of flowering expressed as number of days required to flowering, umbel diameter and it had no effect on auxin, ABA and Kl leveL Planting at 10cm increased gibberelline content. The increasing of GA3 concentration up to
200ppm caused a reduction in number of the days required to flowering in both seasons and caused a significant increase in seedstalk length , 151 and 2"d orders umbel diameter, umbel weight of
2"d order and number of umbels for 3rd order per plant. Increasing GA.3 concentration rate up to 200ppm gave the highest content of auxin, GA and Kl and the lowest content of ABA. Increasing cold storage duration significantly decreased the survival plants percentage. Cold storing at 5•c for 45 and 60 days gave the highest values of seedstalk length, while, at 5•c for 30 days gave the highest value of umbel weight and number of umbels per plant compared with control. Cold storing at 5•c for 60 days increased the level of auxin and GA. Cold storing at 5•c for 30,45 and 60 days decreased ABA
level compared with control. Increasing of planting distances and GAl concentration up to 200ppm gave the shortest time to flowering. Cold storage decreased survival percentage of plants. Duration of
cold storage at s•c for 45 and 60 days increased seedstalk
length.Cold storage of carrot roots at s•c for 30 days significantly
increased the seed yield of 151
2"d, and 3rd orders and total seed yield
per plant and significantly increased the seed quality parameters expressed as germination percentage and rate compared with the unstored roots (control). The roots originated from imported seeds gave the best quality of root characters expressed as root length and diameter, flesh thickness, core thickness, carotene content, dry matter percentage and also average root weight and consequently root yield compared with control.
The roots originated from local produced seeds by using GAl at
200ppm and planting at 20cm were less in quality compared with those originated from imported seeds for carotene content, average root weight and yield per feddan. Therefore, cold storage of carrot
roots at s•c for 30 days or planting at 20cm and spraying with GAl at
200ppm may be recommended for fair or acceptable production of carrot seeds.
The values of percentage of survival of plants significantly increased by increasing the planting distance to 20cm. while, it significantly reduced the seed stalk length. The increasing of planting distances had no significant effect on the date of flowering expressed as number of days required to flowering, umbel diameter and it had no effect on auxin, ABA and Kl leveL Planting at 10cm increased gibberelline content. The increasing of GA3 concentration up to
200ppm caused a reduction in number of the days required to flowering in both seasons and caused a significant increase in seedstalk length , 151 and 2"d orders umbel diameter, umbel weight of
2"d order and number of umbels for 3rd order per plant. Increasing GA.3 concentration rate up to 200ppm gave the highest content of auxin, GA and Kl and the lowest content of ABA. Increasing cold storage duration significantly decreased the survival plants percentage. Cold storing at 5•c for 45 and 60 days gave the highest values of seedstalk length, while, at 5•c for 30 days gave the highest value of umbel weight and number of umbels per plant compared with control. Cold storing at 5•c for 60 days increased the level of auxin and GA. Cold storing at 5•c for 30,45 and 60 days decreased ABA
level compared with control. Increasing of planting distances and GAl concentration up to 200ppm gave the shortest time to flowering. Cold storage decreased survival percentage of plants. Duration of
cold storage at s•c for 45 and 60 days increased seedstalk
length.Cold storage of carrot roots at s•c for 30 days significantly
increased the seed yield of 151
2"d, and 3rd orders and total seed yield
per plant and significantly increased the seed quality parameters expressed as germination percentage and rate compared with the unstored roots (control). The roots originated from imported seeds gave the best quality of root characters expressed as root length and diameter, flesh thickness, core thickness, carotene content, dry matter percentage and also average root weight and consequently root yield compared with control.
The roots originated from local produced seeds by using GAl at
200ppm and planting at 20cm were less in quality compared with those originated from imported seeds for carotene content, average root weight and yield per feddan. Therefore, cold storage of carrot
roots at s•c for 30 days or planting at 20cm and spraying with GAl at
200ppm may be recommended for fair or acceptable production of carrot seeds.
Other data
| Title | STUDIES ON THE PRODUCTION OF CARROT SEEDS UNDER EGYPTIAN CONDITIONS | Other Titles | دراسات علي إنتاج بذور الجزر تحت الظروف المصرية | Authors | ABDALLA ABDEL-AZEZ GHONAME EL-SAYED | Keywords | .Carrot, planting distances, GA3 application, cold storage, flowering, hormonal content, seed yield, seed quality, root quality | Issue Date | 2000 |
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