Cobalt: An Essential Micronutrient for Plant Growth?

Cobalt is a transition metal located in the fourth row of the periodic table and is a neighbor of iron and nickel. It has been considered an essential element for prokaryotes, human beings, and other mammals, but its essentiality for plants remains obscure. In this article, we proposed that cobalt (...

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Autores principales: Xiu Hu, Xiangying Wei, Jie Ling, Jianjun Chen
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Publicado: Frontiers Media S.A. 2021
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spelling oai:doaj.org-article:4c627432ca3c485a9ec53648505105522021-11-16T06:20:03ZCobalt: An Essential Micronutrient for Plant Growth?1664-462X10.3389/fpls.2021.768523https://doaj.org/article/4c627432ca3c485a9ec53648505105522021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpls.2021.768523/fullhttps://doaj.org/toc/1664-462XCobalt is a transition metal located in the fourth row of the periodic table and is a neighbor of iron and nickel. It has been considered an essential element for prokaryotes, human beings, and other mammals, but its essentiality for plants remains obscure. In this article, we proposed that cobalt (Co) is a potentially essential micronutrient of plants. Co is essential for the growth of many lower plants, such as marine algal species including diatoms, chrysophytes, and dinoflagellates, as well as for higher plants in the family Fabaceae or Leguminosae. The essentiality to leguminous plants is attributed to its role in nitrogen (N) fixation by symbiotic microbes, primarily rhizobia. Co is an integral component of cobalamin or vitamin B12, which is required by several enzymes involved in N2 fixation. In addition to symbiosis, a group of N2 fixing bacteria known as diazotrophs is able to situate in plant tissue as endophytes or closely associated with roots of plants including economically important crops, such as barley, corn, rice, sugarcane, and wheat. Their action in N2 fixation provides crops with the macronutrient of N. Co is a component of several enzymes and proteins, participating in plant metabolism. Plants may exhibit Co deficiency if there is a severe limitation in Co supply. Conversely, Co is toxic to plants at higher concentrations. High levels of Co result in pale-colored leaves, discolored veins, and the loss of leaves and can also cause iron deficiency in plants. It is anticipated that with the advance of omics, Co as a constitute of enzymes and proteins and its specific role in plant metabolism will be exclusively revealed. The confirmation of Co as an essential micronutrient will enrich our understanding of plant mineral nutrition and improve our practice in crop production.Xiu HuXiangying WeiJie LingJianjun ChenFrontiers Media S.A.articlecobalamincobaltendophytesessential nutrientsmicronutrientssymbiosisPlant cultureSB1-1110ENFrontiers in Plant Science, Vol 12 (2021)
institution DOAJ
collection DOAJ
language EN
topic cobalamin
cobalt
endophytes
essential nutrients
micronutrients
symbiosis
Plant culture
SB1-1110
spellingShingle cobalamin
cobalt
endophytes
essential nutrients
micronutrients
symbiosis
Plant culture
SB1-1110
Xiu Hu
Xiangying Wei
Jie Ling
Jianjun Chen
Cobalt: An Essential Micronutrient for Plant Growth?
description Cobalt is a transition metal located in the fourth row of the periodic table and is a neighbor of iron and nickel. It has been considered an essential element for prokaryotes, human beings, and other mammals, but its essentiality for plants remains obscure. In this article, we proposed that cobalt (Co) is a potentially essential micronutrient of plants. Co is essential for the growth of many lower plants, such as marine algal species including diatoms, chrysophytes, and dinoflagellates, as well as for higher plants in the family Fabaceae or Leguminosae. The essentiality to leguminous plants is attributed to its role in nitrogen (N) fixation by symbiotic microbes, primarily rhizobia. Co is an integral component of cobalamin or vitamin B12, which is required by several enzymes involved in N2 fixation. In addition to symbiosis, a group of N2 fixing bacteria known as diazotrophs is able to situate in plant tissue as endophytes or closely associated with roots of plants including economically important crops, such as barley, corn, rice, sugarcane, and wheat. Their action in N2 fixation provides crops with the macronutrient of N. Co is a component of several enzymes and proteins, participating in plant metabolism. Plants may exhibit Co deficiency if there is a severe limitation in Co supply. Conversely, Co is toxic to plants at higher concentrations. High levels of Co result in pale-colored leaves, discolored veins, and the loss of leaves and can also cause iron deficiency in plants. It is anticipated that with the advance of omics, Co as a constitute of enzymes and proteins and its specific role in plant metabolism will be exclusively revealed. The confirmation of Co as an essential micronutrient will enrich our understanding of plant mineral nutrition and improve our practice in crop production.
format article
author Xiu Hu
Xiangying Wei
Jie Ling
Jianjun Chen
author_facet Xiu Hu
Xiangying Wei
Jie Ling
Jianjun Chen
author_sort Xiu Hu
title Cobalt: An Essential Micronutrient for Plant Growth?
title_short Cobalt: An Essential Micronutrient for Plant Growth?
title_full Cobalt: An Essential Micronutrient for Plant Growth?
title_fullStr Cobalt: An Essential Micronutrient for Plant Growth?
title_full_unstemmed Cobalt: An Essential Micronutrient for Plant Growth?
title_sort cobalt: an essential micronutrient for plant growth?
publisher Frontiers Media S.A.
publishDate 2021
url https://doaj.org/article/4c627432ca3c485a9ec5364850510552
work_keys_str_mv AT xiuhu cobaltanessentialmicronutrientforplantgrowth
AT xiangyingwei cobaltanessentialmicronutrientforplantgrowth
AT jieling cobaltanessentialmicronutrientforplantgrowth
AT jianjunchen cobaltanessentialmicronutrientforplantgrowth
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