The pigment complex and photosynthetic activity in the annual cycle of Polytrichum commune in the forest belt of the Khibiny Mountains on the Kola Peninsula of Russia

IF 0.5 Q4 ECOLOGY

Czech Polar Reports Pub Date : 2020-08-07 DOI:10.5817/cpr2020-1-4

N. Y. Shmakova, O. Ermolaeva

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引用次数: 2

Abstract

This paper presents data on the content and ratio of pigments, photosynthesis rate, and assimilation number throughout the annual cycle of Polytrichum commune in the forest belt of the Khibiny Mountains. It is shown that the activity of the pigment complex in the photosynthetic organs of P. commune is preserved and maintained over 2 years. The highest content of plastid pigments in this year’s shoots was recorded in fall, in the past year’s shoots in the summer. In winter, the content of chlorophylls in the photosynthetic organs of this year’s shoots decreased in 1.5 times relative to the summer maximum, and carotenoids - in 1.4 times. In the past year’s shoots, no significant changes in the content of the pigments were noted. During the active vegetation period, the photosynthetic intensity in this year’s shoots is in 1.5 times as high as that in the past year’s shoots. At the end of the growing season in the past year’s shoots the value of LHC (76%) due to their immersion deep into the moss clumps and shading them with this year’s shoots. Chlorophyll’s efficiency (assimilation number) in P. commune shoots of different ages in early spring (April) is in 2 times as high as that in fall (October).

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俄罗斯科拉半岛Khibiny山脉林带Polytrichum群落年周期中的色素复合体和光合活性

本文报道了希比尼山林带红毛杨群落的色素含量、光合速率和同化数在整个年循环中的变化情况。结果表明，光合器官中色素复合物的活性可保持2年以上。今年枝条中质体色素含量最高的是秋季，去年枝条中质体色素含量最高的是夏季。在冬季，今年嫩枝光合器官叶绿素含量比夏季最大值下降了1.5倍，类胡萝卜素含量下降了1.4倍。在过去一年的芽中，色素含量没有显著变化。在植被活跃期，今年枝条的光合强度是往年枝条的1.5倍。在过去一年的幼苗生长季节结束时，LHC的价值(76%)，因为它们深深地浸入苔藓丛中，并用今年的幼苗遮蔽它们。早春(4月)不同年龄的白杨幼芽叶绿素吸收效率(同化数)是秋季(10月)的2倍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Czech Polar Reports Agricultural and Biological Sciences-Agricultural and Biological Sciences (all)

CiteScore

1.30

自引率

10.00%

发文量

期刊介绍： Czech Polar Reports is an international, multidisciplinary, peer-reviewed journal. It is issued 2 times a year. The journal is dedicated to provide original research papers for sciences related to the polar regions and other planets with polar analogues. Czech Polar Reports covers the disciplines listed below. polar paleontology, geology, geochemistry, geomorphology, glaciology, climatology, hydrology, pedology, biochemistry, ecology, environmental science, microbiology, plant and animal biology including marine biology.