Influence of soil conditions on the manifestation of chlorosis and parthenocarp in Lonicera caerulea L
A. I. SYSO1, I. G. BOYARSKIKH1,2, JUNWEI HUO3, T. I. SYROMLYA1
1Institute of Soil Science and Agrochemistry SB RAS, Novosibirsk, Russia
2Central Siberian Botanical Garden, Novosibirsk, Russia
3College of Horticulture, Northeast Agricultural University, Harbin, China
Keywords: blue honeysuckle, plant species introduction, acidic soils, aluminum, manganese, iron, chlorosis, parthenocarpy
Abstract
To reveal changes in plant mineral nutrition causing leaves’ chlorosis and parthenocarpy in the blue honeysuckle plants of Siberian origin, grown on plantations in Heilongjiang Province, China, we compared macro- and trace elements’ composition in two counties in China and two districts in the south of the West Siberian plain. It was found that massive leaves’ chlorosis and dying-off, as well as hormonal changes resulting in parthenocarpal fruits, may be associated with soil acidity (рНKCl 4.0-4.5) on some of the study sites in the Heilongjiang Province, as such high acidity increased plant available Al, Fe and Mn concentrations to phytotoxic levels. The blue honeysuckle plants grown on such study sites had specific patterns of Al, Fe, Mn, Cu and Zn distribution throughout their organs, as well as accumulation of toxic concentrations of Al, Fe, Mn in leaves, resulting in aberrant P/Al, Ca/Al, Mg/Al, P/Fe, P/Mn, Cu/Fe and Cu/Mn ratios, which are vitally important for plants.
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