Aluminum accumulation and tolerance in four Amaranthus species

被引:2
作者
Nazari, Fatemeh [1 ]
Hajiboland, Roghieh [1 ]
Salehi-Lisar, Seyed-Yahya [1 ]
Kahneh, Ehsan [2 ]
Moradi, Aioub [3 ]
Poschenrieder, Charlotte [4 ]
机构
[1] Univ Tabriz, Dept Plant Sci, Tabriz 5166616471, Iran
[2] AREEO, Tea Res Ctr, Iran Hort Sci Res Inst, Lahijan, Iran
[3] AREEO, Rasht, Iran
[4] Univ Autonoma Barcelona, Biosci Fac, Plant Physiol Lab, Bellaterra 08193, Spain
关键词
Aluminum hyperaccumulation; Amaranthus; tea gardens; weed flora; ANTIOXIDANT ACTIVITY; ANTHOCYANINS; MECHANISMS; RESISTANCE; TOXICITY; GROWTH; PLANTS; BLUE;
D O I
10.37427/botcro-2023-006
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
About one-third of the earth's land area consists of acidic soils. The rhizotoxic Al3+ is one of the primary constraints associated with low soil pH. Various Amaranthus species are important components of the weed flora in tea plantations on acid soils in north Iran. In this study, four Amaranthus species (A. blitoides, A. retroflexus, A. cruentus, and A. tricolor) were grown under hydroponic conditions with total Al concentrations of 0, 20, 50, 200, and 400 mu M corresponding to free Al3+ activity of 0, 3.75, 11.97, 60.34, and 125 mu M, respectively. Low Al concentrations (20, 50, or 200 mu M) stimulated plant growth; A. tricolor demonstrated the highest improvement in shoot growth (93%), whereas A. retroflexus exhibited the greatest improvement in root biomass (367%), total root length (173%), and taproot length (32%). Although the response of shoot biomass to 400 mu M Al varied among species, all species were able to accumulate Al in the leaves above the critical level for Al hyperaccumulation (1 mg g(-1) DW). Our findings revealed Al accumulation in Amaranthus species for the first time at the genus and family levels, suggesting that these species are suitable for the restoration and revegetation of acid-eroded soils.
引用
收藏
页码:117 / 127
页数:11
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