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Title
(in the language of the original copy)
Seed and cone morphometric indicators: A new tool for the discrimination between the common Mediterranean pines Pinus halepensis Mill. and P. brutia Ten
English translation Seed and cone morphometric indicators: A new tool for the discrimination between the common Mediterranean pines Pinus halepensis Mill. and P. brutia Ten
Reference Identifier 2895
Written by DASKALAKOU, EN; THANOS, CA
Keywords Aleppo pine, East Mediterranean pine, cone length/width ratio, seed coat, seed mass
Concerned Units

Wildland fire, ecosystems functioning and bio-diversity

Phoenix related ? This reference IS NOT related to Phoenix project
Publication Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology: Official Journal of the Societa Botanica Italiana, 144 (4): 819-825

Issued in 12 / 2010 and originally written in English.
To obtain it, please contact its current manager through email.


Summary (in the language of the original copy) English summary
The two typical Mediterranean pines of Greece (Pinus halepensis Mill. and P. brutia Ten.) show a distinct, natural geographical distribution. However, in sites where they grow in sympatry (mainly due to extended reforestations), their morphological discrimination is not always easy. In the present study, three new morphometric indicators are introduced (at decreasing rank of reliability): (a) seed coat mass fraction, expressed as a percentage of the total seed mass (SM) (overall mean values 27.90.5 (n=160), and 58.00.3 (n=320) from 18 and 16 populations of Aleppo and East Mediterranean pine, respectively), (b) mean SM (16.700.26 mg, n=651, and 42.790.61 mg, n=425 from 18 and 16 populations of each of the two species, respectively) and (c) cone length/width ratio (2.200.01, n=651, and 1.770.01, n=606 from the same 18 and 16 populations, respectively). These three parameters are easily calculated, and constitute a reliable tool for the discrimination of the two pine species on the basis of their reproductive units (cones and seeds), provided that a minimal number of randomly collected samples is used for each indicator: 20 seeds for the measurement of seed coat mass fraction, about 1000 seeds for the estimation of mean SM, and 20 cones for the calculation of the cone length/width ratio. The functional implications of these adaptive traits are discussed. The two typical Mediterranean pines of Greece (Pinus halepensis Mill. and P. brutia Ten.) show a distinct, natural geographical distribution. However, in sites where they grow in sympatry (mainly due to extended reforestations), their morphological discrimination is not always easy. In the present study, three new morphometric indicators are introduced (at decreasing rank of reliability): (a) seed coat mass fraction, expressed as a percentage of the total seed mass (SM) (overall mean values 27.90.5 (n=160), and 58.00.3 (n=320) from 18 and 16 populations of Aleppo and East Mediterranean pine, respectively), (b) mean SM (16.700.26 mg, n=651, and 42.790.61 mg, n=425 from 18 and 16 populations of each of the two species, respectively) and (c) cone length/width ratio (2.200.01, n=651, and 1.770.01, n=606 from the same 18 and 16 populations, respectively). These three parameters are easily calculated, and constitute a reliable tool for the discrimination of the two pine species on the basis of their reproductive units (cones and seeds), provided that a minimal number of randomly collected samples is used for each indicator: 20 seeds for the measurement of seed coat mass fraction, about 1000 seeds for the estimation of mean SM, and 20 cones for the calculation of the cone length/width ratio. The functional implications of these adaptive traits are discussed.

Author's complete information

DASKALAKOU, EN; THANOS, CA
National Agricultual Research Foundation, Institute of Mediterranean Forest Ecosystem and Forest Products Technology(National Agricultual Research Foundation, Institute of Mediterranean Forest Ecosystem and Forest Products Technology)

Address Others
Terma Alkmanos
Athens 11528
Attica
Greece
Phone: +30-210-778_6175
Facsimile: +30-210-778_4602
Email: edaskalakou@fria.gr
URL : http://fria.gr

IJWF Reference

DASKALAKOU, EN; THANOS, CA, 2010. Seed and cone morphometric indicators: A new tool for the discrimination between the common Mediterranean pines Pinus halepensis Mill. and P. brutia Ten. Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology: Official Journal of the Societa Botanica Italiana, 144 (4): 819-825

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