000			02448nab a22003737a 4500
999			_c61839 _d61831
001			61839
003			MX-TxCIM
005			20200518221321.0
008			180103s2013 at |||p|op||| 00| 0 eng d
022			_a1445-4408
022			_a1445-4416 (Online)
024	8		_ahttps://doi.org/10.1071/FP12177
040			_aMX-TxCIM
041			_aeng
100	1		_912975 _aGutjahr, S.
245	1	0	_aGrain, sugar and biomass accumulation in photoperiod-sensitive sorghums. II. Biochemical processes at internode level and interaction with phenology
260			_aVictoria (Australia) : _bCSIRO Publising, _c2013.
500			_aPeer review
520			_aSugar accumulation in sorghum (Sorghum bicolor (L.) Moench) stems is a complex trait that is particularly plastic in response to photoperiod. This study investigated sucrose accumulation in a sterile (no grain filling) and fertile near-isogenic line of the photoperiod-sensitive cultivar IS2848 in two greenhouse experiments. Variable phenology was induced by applying a short (12-h PP) and a long (13-h PP) photoperiod. Dynamics of plant growth, phenology, sugar accumulation and related enzyme activities in internodes were investigated. Under 13-h PP, plants flowered 28 days later and attained threefold higher sucrose concentration at anthesis compared with those under 12-h PP. Sucrose accumulation in individual internodes was driven by organ physiological age, not by plant phenology. Competition with grain filling was marginal but greater under 12-h PP (i.e. when sucrose accumulation in internodes occurred after flowering). Enzyme activities showed marked developmental patterns but contributed little to explaining differences between treatments and genotypes. The study demonstrates that sucrose storage physiology in sweet sorghum resembles that of sugarcane (Saccharum spp.) but is more complex due to photoperiod effects on phenology. It confirms the field results on 14 sorghum genotypes contrasting for phenology and photoperiod sensitivity presented in a companion paper. Perspectives for developing sorghum ideotype concepts for food and fuel crops are discussed.
546			_aText in English
650		7	_94657 _aEnzymes _2AGROVOC
650		7	_91911 _aSeed filling _2AGROVOC
650		7	_99147 _aInternodes _2AGROVOC
650		7	_93050 _aPhotoperiodicity _2AGROVOC
650		7	_911941 _aSucrose _2AGROVOC
650		7	_92911 _aSorghum bicolor _2AGROVOC
700	1		_912976 _aClément-Vidal, A.
700	1		_912977 _aSoutiras, A.
700	1		_912978 _aSonderegger, N.
700	1		_912979 _aBraconnier, S.
700	1		_912980 _aDingkuhn, M.
700	1		_912981 _aLuquet, D.
773	0		_gv. 40, no. 4, p. 355-368 _tFunctional Plant Biology _x1445-4408 _dVictoria (Australia) : CSIRO Publising, 2013. _w447878
942			_2ddc _cJA _n0