Forest and Grassland Resources Research >
Responses of cone and seed morphological traits of Pinus sylvestris var.mongolica to environmental factors in northwest China
Received date: 2025-07-31
Revised date: 2025-08-20
Online published: 2026-02-13
In order to investigate the variation of cone and seed morphological traits of Pinus sylvestris var.mongolica in the northwest area and their relationship with the environment,we used the cones and seeds of P.sylvestris var.mongolica forests from the following four locations as experimental materials:Dengkou County,Bayannur City,Inner Mongolia Autonomous Region;Ejin Horo Banner,Ordos City,Inner Mongolia Autonomous Region;Minqin County,Wuwei City,Gansu Province;and Honghua’erji Town,Evenk Autonomous Banner,Hulunbuir City,Inner Mongolia Autonomous Region.We studied the effects of climate and soil on cone and seed morphological traits of Pinus sylvestris var.mongolica.The results indicated the following:1) The variation coefficients of cone and seed morphological traits in the four regions ranged from 1.60% to 48.22%.The inter-regional variation coefficient was higher than that within the same region.The variation of cone morphological traits was always higher than that of seed morphological traits.2) The order of cone morphological traits from large to small in the four regions was as follows:Honghua’erji Town,Ejin Horo Banner,Dengkou County,Minqin County.3) The cone length (CL),seed length (SL),and samara length (TL) of P.sylvestris var.mongolica were significantly positively correlated with hydrolyzed nitrogen (AN) and available phosphorus (AP) (P<0.05),but the seed weight (SW) and seed volume (SV) were negatively correlated with AN and AP.4) The aridity index (AL) was negatively correlated with most cone and seed morphological traits,while the average annual precipitation (AAP) was positively correlated with many cone and some seed morphological traits.In general,the 12 environmental factors had an contribution rate of up to 99.99% for the cone and seed morphological traits of P.sylvestris var.mongolica.The contribution rate of meteorological factors was 88.10%,and that of soil factors was only 11.89%.The AAP had an contribution rate of up to 86.40% for the variation in cone and seed morphological traits of P.sylvestris var.mongolica across the four regions,indicating that AAP was the key environmental factor driving the phenotypic variation of cones and seeds.
Key words： cone; seed; Pinus sylvestris var.mongolica; climate factors; soil factors
Xiaona CHEN , Yuguang HAO , Naqi ZHAO , Jiahua LU , Qinwen BAI . Responses of cone and seed morphological traits of Pinus sylvestris var.mongolica to environmental factors in northwest China[J]. Forest and Grassland Resources Research, 2025 , 0(4) : 62 -70 . DOI: 10.13466/j.cnki.lczyyj.2025.04.007
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