Boron deficiency and concentrations and composition of phenolic compounds in Olea europaea leaves: A combined growth chamber and field study

dc.contributor.author	Liakopoulos, G	en
dc.contributor.author	Karabourniotis, G	en
dc.date.accessioned	2014-06-06T06:46:26Z
dc.date.available	2014-06-06T06:46:26Z
dc.date.issued	2005	en
dc.identifier.issn	0829318X	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/3011
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-16244366843&partnerID=40&md5=bb6d6410e7dbf7959cab41e6252a4481	en
dc.subject	Carbon/nutrient balance hypothesis	en
dc.subject	Flavonoids	en
dc.subject	Growth conditions	en
dc.subject	Leaf	en
dc.subject	Olive tree	en
dc.subject	Plant stress	en
dc.subject	Trichome	en
dc.subject.other	boron	en
dc.subject.other	phenol derivative	en
dc.subject.other	boron	en
dc.subject.other	growth	en
dc.subject.other	leaf	en
dc.subject.other	nutritional disorder	en
dc.subject.other	phenolic compound	en
dc.subject.other	article	en
dc.subject.other	chemistry	en
dc.subject.other	high performance liquid chromatography	en
dc.subject.other	olive tree	en
dc.subject.other	physiology	en
dc.subject.other	plant leaf	en
dc.subject.other	tree	en
dc.subject.other	Boron	en
dc.subject.other	Chromatography, High Pressure Liquid	en
dc.subject.other	Olea	en
dc.subject.other	Phenols	en
dc.subject.other	Plant Leaves	en
dc.subject.other	Trees	en
dc.subject.other	Olea europaea	en
dc.title	Boron deficiency and concentrations and composition of phenolic compounds in Olea europaea leaves: A combined growth chamber and field study	en
heal.type	journalArticle	en
heal.publicationDate	2005	en
heal.abstract	Boron deficiency is the most frequent micronutrient disorder in olive (Olea spp.) orchards. We tested the hypothesis that plant boron status affects phenolic metabolism, which, in turn, influences several ecophysiological traits of olive (Olea europaea L.) trees, by studying the effects of boron deficiency on leaf phenolic compounds of olive in a growth chamber experiment (CE) and a field experiment (FE). In the CE, a semi-hydroponic system was used to control nutrient supply. Plants received complete nutrient solution containing either 23 (control) or 0 μMH3BO3 (boron-deficient treatment). In the FE, boron-deficient trees were chosen based on visible boron-deficiency symptoms and analysis of their leaf boron concentration. Boron deficiency caused significant accumulation of phenolic compounds in leaves of CE plants (1.7 to 5.8 times more, depending on leaf age), but not in leaves of FE plants. However, in both experiments, the concentration of an unidentified phenolic compound, with a UV-spectrum resembling that of caffeic acid, increased in response to boron deficiency (by a factor of 40 to 184 in the CE and by a factor of three in the FE). Regression analysis showed that the concentration of this compound was negatively correlated to leaf boron concentration, irrespective of growth conditions and treatment. We conclude that, under field conditions, boron deficiency may not be the only factor determining the concentration of total phenolics, but it may be responsible for the accumulation of a distinct phenolic metabolite in olive leaves. © 2005 Heron Publishing - Victoria, Canada.	en
heal.journalName	Tree Physiology	en
dc.identifier.issue	3	en
dc.identifier.volume	25	en
dc.identifier.spage	307	en
dc.identifier.epage	315	en