矿坑自然生长的黄蓼繁殖阶段对铁的耐受性增强

IF 3.4 3区生物学 Q1 PLANT SCIENCES

Rhizosphere Pub Date : 2025-04-08 DOI:10.1016/j.rhisph.2025.101068

Mitsuki Yachi , Keiko Yamaji , Kohei Doyama , Toshikatsu Haruma , Xingyan Lu

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引用次数: 0

摘要

浙蓼。调查。一种一年生草本植物，已知在矿区自然生长。考虑碳分配对潜在耐铁因子的影响，研究了矿山池塘中生长的通贝氏沼虾的耐铁机制。2021年6 ~ 10月采集的黄颡鱼生根和死不定根中铁含量较高。在活不定根中，铁是解毒剂（酚类化合物）；没食子酸、原花青素B2、原花青素A2和缩合单宁)和铁在表皮细胞壁的定位影响铁的耐受性。铁在死亡不定根中的积累可能与铁的耐受性有关，因为金属在死亡植物组织中的积累是降低铁毒性的重要排除位点。此外，在9月开花期间，活性不定根中酚类化合物的碳利用比例显著增加。开花期间，死不定根排铁所需的碳也显著减少。结果表明，为了建立下一代，黄颡鱼可以在繁殖阶段增强对铁的耐受性。

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Enhancement of Fe tolerance in Polygonum thunbergii naturally growing in mine pond at the reproduction stage

Polygonum thunbergii Sieb. et Zucc., an annual herb, has been known to grow naturally at mine sites. This study examined the Fe tolerance mechanisms in P. thunbergii growing in a mine pond, considering carbon allocation to potential Fe-tolerance factors. Fe concentrations in P. thunbergii collected from June to October 2021, were high especially in live and dead adventitious roots. In the live adventitious roots, Fe detoxicants (phenolic compounds; gallic acid, procyanidin B2, procyanidin A2, and condensed tannins) and Fe localization in the epidermal cell walls could influence Fe tolerance. Fe accumulation in the dead adventitious roots could be related to Fe tolerance because metal accumulation in dead plant tissues is important to decrease Fe toxicity as exclusion site. In addition, the proportion of carbon used for phenolic compounds significantly increased in live adventitious roots at the flowering time in September. Significantly less carbon for Fe exclusion by dead adventitious roots was also detected at the flowering time. Our results suggest that in order to establish the next generation, P. thunbergii could enhance Fe tolerance at the reproduction stage.

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来源期刊

Rhizosphere Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

5.70

自引率

8.10%

发文量

155

审稿时长

29 days

期刊介绍： Rhizosphere aims to advance the frontier of our understanding of plant-soil interactions. Rhizosphere is a multidisciplinary journal that publishes research on the interactions between plant roots, soil organisms, nutrients, and water. Except carbon fixation by photosynthesis, plants obtain all other elements primarily from soil through roots. We are beginning to understand how communications at the rhizosphere, with soil organisms and other plant species, affect root exudates and nutrient uptake. This rapidly evolving subject utilizes molecular biology and genomic tools, food web or community structure manipulations, high performance liquid chromatography, isotopic analysis, diverse spectroscopic analytics, tomography and other microscopy, complex statistical and modeling tools.