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首页> 外文期刊>Ecotoxicology and Environmental Safety >Translocation of heavy metals from soils into floral organs and rewards of Cucurbita pepo: Implications for plant reproductive fitness
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Translocation of heavy metals from soils into floral organs and rewards of Cucurbita pepo: Implications for plant reproductive fitness

机译：重金属从土壤到花器官的转运和南瓜的收获：对植物生殖健康的影响

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摘要

Metals and metalloids in soil could be transferred into reproductive organs and floral rewards of hyper-accumulator plants and influence their reproductive success, yet little is known whether non-hyperaccumulator plants can translocate heavy metals from soil into their floral organs and rewards (i.e., nectar and pollen) and, if so, whether plant reproduction will be affected. In our studies, summer squash (Cucurbita pepo L. cv. Golden Apple) was exposed to heavy-metal treatments during bud stage to investigate the translocation of soil-supplemented zinc, copper, nickel and lead into its floral organs (pistil, anther and nectary) and rewards (nectar and pollen) as well as floral metal accumulation effects on its reproduction. The results showed that metals taken up by squash did translocate into its floral organs and rewards, although metal accumulation varied depending on different metal types and concentrations as well as floral organ/reward types. Mean foraging time of honey bees to each male and female flower of squash grown in metal-supplemented soils was shorter relative to that of plants grown in control soils, although the visitation rate of honeybees to both male and female flowers was not affected by metal treatments. Pollen viability, pollen removal and deposition as well as mean mass per seed produced by metal-treated squash that received pollen from plants grown in control soils decreased with elevated soil-supplemented metal concentrations. The fact that squash could translocate soil-supplemented heavy metals into floral organs and rewards indicated possible reproductive consequences caused either directly (i.e., decreasing pollen viability or seed mass) or indirectly (i.e., affecting pollinators' visitation behavior to flowers) to plant fitness.
机译：土壤中的金属和准金属可能会转移到超富集植物的生殖器官和花果中，并影响它们的繁殖成功，但对于非超积累植物能否将重金属从土壤转移到其花器官和花果中（即花蜜），人们鲜为人知。和花粉），如果这样，是否会影响植物繁殖。在我们的研究中，西葫芦（Cucurbita pepo L. cv。Golden Apple）在芽期期间接受了重金属处理，以研究土壤补充的锌，铜，镍和铅向花器官（雌蕊，花药和蜜腺和花蜜（花蜜和花粉），以及花卉金属积累对其繁殖的影响。结果表明，壁球吸收的金属确实转移到其花器官和奖励中，尽管金属积累根据不同的金属类型和浓度以及花器官/奖励类型而变化。尽管蜜蜂对雄花和雌花的访存率均不受金属处理的影响，但在金属添加的土壤中，蜜蜂对每只雄性和雌性南瓜的平均觅食时间都比对照土壤中的植物的平均觅食时间短。 。花粉生存力，花粉去除和沉积以及金属处理过的南瓜从对照土壤中生长的植物中获取花粉后所产生的每粒种子的平均质量随土壤补充金属浓度的升高而降低。南瓜可以将土壤中添加的重金属转移到花器官中并获得奖励，这一事实表明，可能直接（即降低花粉活力或种子质量）或间接（即影响传粉者对花的造访行为）对植物适应性造成的生殖后果。

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  • 来源
    《Ecotoxicology and Environmental Safety》 |2017年第11期|235-243|共9页
  • 作者

    Xun Erna; Zhang Yanwen; Zhao Jimin; Guo Jixun;

  • 作者单位

    Northeast Normal Univ, Inst Grassland Sci, Changchun 130024, Jilin, Peoples R China|Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China;

    Northeast Normal Univ, Inst Grassland Sci, Changchun 130024, Jilin, Peoples R China|Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China|Changchun Univ, Dept Biol, Changchun 130032, Jilin, Peoples R China|Eastern Liaoning Univ, Dept Biol, Dandong 118003, Peoples R China;

    Changchun Univ, Dept Biol, Changchun 130032, Jilin, Peoples R China;

    Northeast Normal Univ, Inst Grassland Sci, Changchun 130024, Jilin, Peoples R China|Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cucurbita pepo L; Floral organs; Floral rewards; Heavy metal; Floral metal accumulation; Reproductive fitness;

    机译：南瓜;花器官;花奖赏;重金属;花金属积累;生殖适应性;

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