Effects of elevated temperature and CO2 on aboveground-belowground systems: a case study with plants, their mutualistic bacteria and root/shoot herbivores.
Effects of elevated temperature and CO2 on aboveground-belowground systems: a case study with plants, their mutualistic bacteria and root/shoot herbivores.
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DOI：
10.3389/fpls.2013.00445
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发表时间：
2013
影响因子：
5.6
通讯作者：
Johnson SN
中科院分区：
文献类型：
--
作者：
Ryalls JM;Riegler M;Moore BD;Lopaticki G;Johnson SN
地上和地下食草动物之间的相互作用从一开始就在地上地下生态学领域中很突出，尽管人们对气候变化如何影响这些生物体共享同一植物时知之甚少。此外，与气候变化相关的多种因素（例如气温升高（eT）和大气二氧化碳（eCO2）升高）的交互影响尚未经过测试。我们研究了 eT 和 eCO2 如何影响苜蓿象鼻虫 (Sitona discoideus) 幼虫的发育以及豌豆蚜 (Acyrthosiphon pisum) 在常见寄主植物苜蓿 (Medicago sativa) 的三个品种上的定植。 Sitona discoideus 幼虫以含有固氮根瘤菌的根瘤为食，这使我们能够测试 eT 和 eCO2 在不同营养水平上的影响。此外，我们评估了这些因素对植物生长的影响。 eT 最初提高了植物生长速度（播种后 6、8 和 10 周），品种“Sequel”达到了最高高度。然而，接种蚜虫在第 14 周时降低了植物生长。eT 使根结瘤严重减少了 43%，而 eCO2 则促进了根结瘤 56%，但仅限于环境温度。象鼻虫的存在使净根生物量和结瘤分别增加了 31% 和 45%，显示出过度补偿的植物生长反应。 eT 和 eCO2 对根结瘤的影响反映在象鼻虫幼虫的发育中； eT 和 eCO2 分别减少和增加幼虫发育。与预期相反，蚜虫定殖不受 eT 或 eCO2 的影响，但在地下有象鼻虫的植物上定殖率几乎显着降低了 10%。 eT 和 eCO2 对象鼻虫的对比效应可能是通过根结瘤模式的变化而发生的。
Interactions between above- and belowground herbivores have been prominent in the field of aboveground-belowground ecology from the outset, although little is known about how climate change affects these organisms when they share the same plant. Additionally, the interactive effects of multiple factors associated with climate change such as elevated temperature (eT) and elevated atmospheric carbon dioxide (eCO2) are untested. We investigated how eT and eCO2 affected larval development of the lucerne weevil (Sitona discoideus) and colonization by the pea aphid (Acyrthosiphon pisum), on three cultivars of a common host plant, lucerne (Medicago sativa). Sitona discoideus larvae feed on root nodules housing N2-fixing rhizobial bacteria, allowing us to test the effects of eT and eCO2 across trophic levels. Moreover, we assessed the influence of these factors on plant growth. eT increased plant growth rate initially (6, 8 and 10 weeks after sowing), with cultivar “Sequel” achieving the greatest height. Inoculation with aphids, however, reduced plant growth at week 14. eT severely reduced root nodulation by 43%, whereas eCO2 promoted nodulation by 56%, but only at ambient temperatures. Weevil presence increased net root biomass and nodulation, by 31 and 45%, respectively, showing an overcompensatory plant growth response. Effects of eT and eCO2 on root nodulation were mirrored by weevil larval development; eT and eCO2 reduced and increased larval development, respectively. Contrary to expectations, aphid colonization was unaffected by eT or eCO2, but there was a near-significant 10% reduction in colonization rates on plants with weevils present belowground. The contrasting effects of eT and eCO2 on weevils potentially occurred through changes in root nodulation patterns.
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影响因子：
2.6
作者：
GOLDSON, SL;JAMIESON, PD;BOURDOT, GW
通讯作者：
BOURDOT, GW
DOI：
10.1111/j.1570-7458.1992.tb01606.x
发表时间：
1992-08-01
影响因子：
1.9
作者：
QUINN, MA;HALL, MH
通讯作者：
HALL, MH
影响因子：
1.7
作者：
Arbab, Abbas;Kontodimas, Dimitris C.;Mcneill, Mark R.
通讯作者：
Mcneill, Mark R.
影响因子：
2.1
作者：
MUNNS, DN;KEYSER, HH;WHITACRE, KW
通讯作者：
WHITACRE, KW
DOI：
10.1139/b96-192
发表时间：
1996-10-01
期刊：
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE
影响因子：
--
作者：
Murray, PJ;Hatch, DJ;Cliquet, JB
通讯作者：
Cliquet, JB