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Climatic response of tracheid features of Picea meyeri along altitude gradient of Luyashan Mountains of North China

100%

Wang M., Jiang Y., Zhang W., Dong M., Kang M., Xu H.

Polish Journal of Ecology

2017

tom 65

nr 4

Changing localized environmental conditions along altitude gradients could modify the responses of tree xylem structures to climate variations. To explore how trees adapt to local environment and respond to climate variants, we analysed the variation of Picea meyeri xylem tracheid features and the relationships with climate variables along an altitude gradient (1970, 2240, 2490 and 2650 m above sea level) of the Luyashan Mountains in the North China. The results mainly indicated the following: (1) tracheid number and diameter of P. meyeri showed significant differences among the four sites along the altitude gradient; (2) trees at site 2 (2240 m) and site 3 (2490 m) are similar in age, but the xylem tracheid number and diameter of these trees were significantly different, which may indicate different functional adaptation; (3) the relationships between xylem features' residual chronologies and the monthly climate data were inconsistent along altitude gradients, which indicated that the limiting factor of P. meyeri growth along the altitude gradients, shifted from drought stress at lower altitudes to low-temperature stress at higher altitudes.

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Somatic embryogenesis of selected spruce species [Picea abies, P. omorika, P. pungens 'Glauca' and P. breweriana]

84%

Hazubska-Przybyl T., Bojarczuk K.

Acta Societatis Botanicorum Poloniae

2008

tom 77

nr 3

189-199

Somatic embryogenesis was studied in four spruce species (Picea abies, P. omorika, P. pungens 'Glauca' and P. brewenana) to determine if this method can be used for in vitro propagation of coniferous trees. The highest frequency of initiation of embryogenic tissue was obtained when mature zygotic embryos were used as explants. It ranged then from 10.8% (P. brewenana) to 23.75% (P. omorika and P. pungens 'Glauca'). The frequency of embryogenic tissue initiation was strongly affected by medium composition, i.e. addition of appropriate auxins (2,4-D, NAA, Picloram) and sucrose concentration (10-20 g-1"1). A lower frequency was obtained in Picea omorika (10%) when megagametophytes (endosperms with immature zygotic embryos) were used as explants. No emryogenic tissue was produced from hypocotyls, cotyledons and needles. A satisfactory frequency was achieved with the use of somatic embryos of Picea abies (30%). The proliferation of embryogenic cell lines of spruces was affected by medium type. The experiments resulted in production of somatic plantlets of P. abies and P. omorika. This enables the application of this method of spruce micropropagation for genetic and breeding research or for nursery production.

Morphological and anatomical factors responsible for varied susceptibility of some species of spruce to infestation by spruce spider mite [Oligonychus ununguis Jacobi]

67%

Puchalska E., Tykarska T., Czajkowska B.

Acta Physiologiae Plantarum

2006

tom 28

nr 6

Differences in susceptibility to infestation by spruce spider mite of 3 investigated spruce species (Picea glauca ‘Conica’, P. pungens and P. omorika) may be due to features of anatomical and morphological structure of needles. In P. omorika, showing some resistance to the spruce spider mite, we noted lamellar structure of epidermal cell walls and extensive supporting tissues (hypodermis and sclerenchyma fibres) at the whole circumference of the needle.

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 Acta Societatis Botanicorum Poloniae

1 Polish Journal of Ecology

1 Bojarczuk K.

1 Czajkowska B.

1 Dong M.

1 Hazubska-Przybyl T.

1 Jiang Y.

1 Kang M.

1 Puchalska E.

1 Tykarska T.

1 Wang M.

1 Xu H.

1 Zhang W.

1 2017

1 2008

1 2006

Wyniki wyszukiwania

Climatic response of tracheid features of Picea meyeri along altitude gradient of Luyashan Mountains of North China

Somatic embryogenesis of selected spruce species [Picea abies, P. omorika, P. pungens 'Glauca' and P. breweriana]

Morphological and anatomical factors responsible for varied susceptibility of some species of spruce to infestation by spruce spider mite [Oligonychus ununguis Jacobi]