« Previous Abstract"Plant growth promotion, metabolite production and metal tolerance of dark septate endophytes isolated from metal-polluted poplar phytomanagement sites"    Next Abstract"Trait-mediated indirect effects, predators, and disease: test of a size-based model" »

Chem Biodivers

Title:		Pollen aroma fingerprint of two sunflower (Helianthus annuus L.) genotypes characterized by different pollen colors
Author(s):		Bertoli A; Fambrini M; Doveri S; Leonardi M; Pugliesi C; Pistelli L;
Address:		"Dipartimento di Scienze Farmaceutiche, Universita di Pisa, Via Bonanno Pisano 6, I-56126 Pisa. bertoli@farm.unipi.it"
Journal Title:		Chem Biodivers
Year:		2011
Volume:		8
Issue:		9
Page Number:		1766 - 1775
DOI:		10.1002/cbdv.201100045
ISSN/ISBN:		1612-1880 (Electronic) 1612-1872 (Linking)
Abstract:		"Samples of fresh pollen grains, collected from capitula in full bloom from two genotypes of sunflower (Helianthus annuus L.) and characterized by a different color, i.e., white-cream (WC) and orange (O), were analyzed by the HS-SPME (headspace?╖?solid phase microextraction)/GC/MS technique. This study defined for the first time the fingerprint of the sunflower pollen, separated from the disc flowers, to define its contribution to the inflorescence aroma. In the GC/MS fingerprints of the WC and O genotypes, 61 and 62 volatile compounds were identified, respectively. Monoterpene hydrocarbons (34% in O vs. 28% in WC) and sesquiterpene hydrocarbons (37% in O vs. 31% in WC) were ubiquitous in all samples analyzed and represented the main chemical classes. alpha-Pinene (21% in O vs. 20% in WC) and sabinene (11% in O vs. 6% in WC) were the dominant volatiles, but also a full range of aliphatic hydrocarbons and their oxygenated derivatives gave a decisive contribution to the aroma composition (10% in O vs. 12% in WC). In addition, dendrolasin (3% in O vs. 4% in WC) and some minor constituents such as (E)-hex-2-en-1-ol (0.4% in O vs. 0.1% in WC) were pointed out not only for their contribution to the pollen scent, but also for their well-known role in the plant ecological relationships. Having evaluated two pollen morphs with different carotenoid-based colors, the study sought to highlight also the presence of some volatile precursors or derivatives of these pigments in the aroma. However, the pollen aroma of the two selected genotypes made a specific chemical contribution to the sunflower inflorescence scent without any influence on carotenoid derivatives"
Keywords:		Color Gas Chromatography-Mass Spectrometry Genotype Helianthus/*chemistry/genetics Pollen/*chemistry Solid Phase Microextraction Volatile Organic Compounds/*chemistry/isolation & purification;
Notes:		"MedlineBertoli, Alessandra Fambrini, Marco Doveri, Silvia Leonardi, Michele Pugliesi, Claudio Pistelli, Luisa eng Switzerland 2011/09/17 Chem Biodivers. 2011 Sep; 8(9):1766-75. doi: 10.1002/cbdv.201100045"