Root endophytic fungus Piriformospora indica affected growth, cadmium partitioning and chlorophyll fluorescence of sunflower under cadmium toxicity.
Root endophytic fungus Piriformospora indica affected growth, cadmium partitioning and chlorophyll fluorescence of sunflower under cadmium toxicity.
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DOI：
10.1016/j.ecoenv.2017.07.064
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发表时间：
2017-11
影响因子：
6.8
通讯作者：
S. Shahabivand;Azar Parvaneh;A. Aliloo
中科院分区：
文献类型：
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作者：
S. Shahabivand;Azar Parvaneh;A. Aliloo
土壤中的镉(Cd)污染威胁着环境健康的质量，并对作物的生理活动产生有害影响。内生真菌与多种植物共生是改良植物性状和修复重金属污染土壤的一种很有前途的方式。通过盆栽试验，研究了向日葵根内生真菌梨形孢霉对向日葵生长、生理参数及器官镉积累的影响。研究了Cd(0、40、80和120 mg/kg土壤)对Zaria植物的毒害作用。土壤中Cd浓度的增加降低了植株的生长参数、叶绿素a和Chlb含量、Fv/Fm和ETR(电子传递速率)值，但增加了根、茎和叶Cd的积累量和Pro含量。OFP的存在。显著促进生长、Chla、Chl-band、Pro含量、Fv/Fm和ETR值。与未接种的植株相比，接种水稻的植株在根中的镉积累量较高，而在茎叶中的积累量较低。本研究有力地支持了OFP的既定能力。通过改善向日葵的生理状态来缓解Cd毒害。此外，该内生真菌还可用于污染土壤中向日葵根系对Cd的植物稳定作用。
Cadmium (Cd) pollution in the soil threatens the quality of environmental health, and deleteriously affects physiological activities of crops. Symbiosis of endophytic fungi with various plants is a promising manner to improving numerous plant characteristics and remediating heavy metal-polluted soils. In this pot experiment, the influence of root endophyte fungusPiriformospora indicaon growth, physiological parameters and organs Cd accumulation in sunflower cv. Zaria plants under the toxic levels of Cd (0, 40, 80 and 120 mg/kg soil) were studied. Increasing Cd concentration in the soil reduced growth parameters, chlorophyll (Chl)aand Chlbcontents, and Fv/Fm and ETR (electron transport rate) values, but increased root, stem and leaf Cd accumulation, and proline content. The presence ofP. indicasignificantly enhanced growth, Chla, Chlband proline contents, and Fv/Fm and ETR values. Compared to non-inoculated ones,P. indica-inoculated plants had higher Cd accumulation in root, whereas lower Cd accumulation in stem and leaf. The present study strongly supports the established ability ofP. indicato alleviate Cd toxicity by improving the physiological status in sunflower. Furthermore, this endophyte fungus can be useful for Cd phyto-stabilization in sunflower roots in contaminated soils.