TY - JOUR
T1 - Effect of long photoperiod on the reproductive and bulbing processes in garlic (Allium sativum L.) genotypes
AU - Mathew, Deepu
AU - Forer, Yitzhak
AU - Rabinowitch, Haim D.
AU - Kamenetsky, Rina
PY - 2011/6
Y1 - 2011/6
N2 - Garlic (Allium sativum L.) genotypes differ considerably in scape length, flowering ability, and seed production. In bolting clones reproductive processes are facilitated by a combination of specific temperature and photoperiod regimes. However, it is yet unclear whether the phase-specific photoperiod effect on florogenesis is universal for all garlic genotypes. We investigated the effect of ambient day length interruption by 10 or 30 days of long photoperiod in ten garlic accessions belonging to four bio-morphological grups. It was evident that garlic genotypes vary significantly in response to long photoperiod, and that in some clones the treatment enhances florogenesis, flower stalk elongation and bulbing. The competition for resources by the simultaneously developing bulb and inflorescence sinks differentially determines the fate of stalk elongation and flower development in the investigated genotypes. It is concluded that florogenesis in garlic can be promoted by exposure to proper environmental stimuli, during pre-planting storage and sprouting to the later growth stages. The genetic variability acquired from sexual reproduction and vegetatively preserved collections can serve in genetic and physiological studies as well as in breeding programs.
AB - Garlic (Allium sativum L.) genotypes differ considerably in scape length, flowering ability, and seed production. In bolting clones reproductive processes are facilitated by a combination of specific temperature and photoperiod regimes. However, it is yet unclear whether the phase-specific photoperiod effect on florogenesis is universal for all garlic genotypes. We investigated the effect of ambient day length interruption by 10 or 30 days of long photoperiod in ten garlic accessions belonging to four bio-morphological grups. It was evident that garlic genotypes vary significantly in response to long photoperiod, and that in some clones the treatment enhances florogenesis, flower stalk elongation and bulbing. The competition for resources by the simultaneously developing bulb and inflorescence sinks differentially determines the fate of stalk elongation and flower development in the investigated genotypes. It is concluded that florogenesis in garlic can be promoted by exposure to proper environmental stimuli, during pre-planting storage and sprouting to the later growth stages. The genetic variability acquired from sexual reproduction and vegetatively preserved collections can serve in genetic and physiological studies as well as in breeding programs.
KW - Breeding
KW - Development
KW - Diversity
KW - Flowering physiology
KW - Genetic variability
KW - Seed production
KW - Sexual propagation
UR - http://www.scopus.com/inward/record.url?scp=79851508274&partnerID=8YFLogxK
U2 - 10.1016/j.envexpbot.2010.11.008
DO - 10.1016/j.envexpbot.2010.11.008
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AN - SCOPUS:79851508274
SN - 0098-8472
VL - 71
SP - 166
EP - 173
JO - Environmental and Experimental Botany
JF - Environmental and Experimental Botany
IS - 2
ER -