Post by jibro on Feb 5, 2024 2:39:41 GMT -5
In this thread I want to collect all the useful information about improving citrus seed germination, storage and which products to use for seed treatment.
Some basic facts about citrus seeds
- There is no seed dormancy in Citrus because of its tropical nature.
- Citrus seeds contain a large amount of lipid and are, therefore, sensitive to excessive drying.
- About 20 days are required from seed sowing to emergence at an optimum temperature of 30°C in mature Citrus seeds.
- Removal of the seed coat results in the considerable shortening of the days required for germination.
- Germination of Citrus seed is hypogeal.
Optimal temperature for germination of citrus seeds - journals.flvc.org/fshs/article/download/86283/83199
The objective of this study was to determine the optimum temperature for germination of 17 citrus varieties used as rootstocks including standard, previously researched varieties and newer unresearched varieties.
The optimum temperature is defined as the maximum number of seeds germinated in the minimum time.
Results
Optimum temperatures for germination ranged from 77°F = 25°C for P.trifoliata to 90.5°F= 32,5°C for Rangpur × Troyer. The mean of optimum germination temperatures for all varieties was 85.5°F = 29,7°C.
Germinability of embryos during seed development in Citrus (Rutaceae)
In polyembryonic mature seeds, alone and combined applications of 1 mg/1 GA3 and 20 mg/1 adenine solutions increased the number of germinated embryos per seed.
Germination of the immature embryos with low germinability was enhanced by light (3000 luxes), MS medium, adenine (l0-100mg/1), gibberellin (GA3 1-10mg/1) and combination of these factors. These results may contribute to the efficient cross breeding in Citrus.
Germination of the immature embryos with low germinability was enhanced by light (3000 luxes), MS medium, adenine (l0-100mg/1), gibberellin (GA3 1-10mg/1) and combination of these factors. These results may contribute to the efficient cross breeding in Citrus.