Effects of elevated CO2 and/or O-3 on hornionie IAA in needles of Chinese pine

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	Effects of elevated CO2 and/or O-3 on hornionie IAA in needles of Chinese pine
	Li, XM; He, XY; Chen, W; Zhang, LH; Li, XM, Shenyang Normal Univ, Coll Chem & Life Sci, Shenyang 110034, Peoples R China
刊名	PLANT GROWTH REGULATION
	2007
卷号	53 期号:1 页码:25-31
关键词	Chinese Pine Elevated Co2 Elevated O-3 Iaa Iaa Oxidase Peroxidase
ISSN号	0167-6903
英文摘要	This study examined the effects of season-long exposure of Chinese pine (Pinus tabulae-formis) to elevated carbon dioxide (CO2) and/or ozone (O-3) on indole-3-acetic acid (IAA) content, activities of IAA oxidase (IAAO) and peroxidase (POD) in needles. Trees grown in open-top chambers (OTC) were exposed to control (ambient O-3, 55 nmol mol(-1) + ambient CO2, 350 pmol mol-1, CK), elevated CO2 (ambient O-3 + high CO2, 700 pmol mol-1, EC) and elevated 03 (high 03, 80 +/- 8 nmol mol(-1) + ambient CO2, EO) OTCs from 1 June to 30 September. Plants grown in elevated CO2 OTC had a growth increase of axial shoot and needle length, compared to control, by 20% and 10% respectively, while the growth in elevated O-3 OTC was 43% and 7% less respectively, than control. An increase in IAA content and POD activity and decrease in IAAO activity were observed in trees exposed to elevated CO2 concentration compared with control. Elevated O-3 decreased IAA content and had no significant effect on IAAO activity, but significantly increased POD activity. When trees preexposed to elevated CO2 were transferred to elevated O-3 (EC-EO) or trees pre-exposed to elevated O-3 were transferred to elevated CO2 (EO-EC), IAA content was lower while IAAO activity was higher than that transferred to CK (EC-CK or EO-CK), the change in IAA content was also related to IAAO activity. The results indicated that IAAO and POD activities in Chinese pine needles may be affected by the changes in the atmospheric environment, resulting in the change of IAA metabolism which in turn may cause changes in Chinese pine's growth.
学科主题	Plant Sciences
语种	英语
WOS记录号	WOS:000250086800004
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54601]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Li, XM, Shenyang Normal Univ, Coll Chem & Life Sci, Shenyang 110034, Peoples R China
推荐引用方式 GB/T 7714	Li, XM,He, XY,Chen, W,et al. Effects of elevated CO2 and/or O-3 on hornionie IAA in needles of Chinese pine[J]. PLANT GROWTH REGULATION,2007,53(1):25-31.
APA	Li, XM,He, XY,Chen, W,Zhang, LH,&Li, XM, Shenyang Normal Univ, Coll Chem & Life Sci, Shenyang 110034, Peoples R China.(2007).Effects of elevated CO2 and/or O-3 on hornionie IAA in needles of Chinese pine.PLANT GROWTH REGULATION,53(1),25-31.
MLA	Li, XM,et al."Effects of elevated CO2 and/or O-3 on hornionie IAA in needles of Chinese pine".PLANT GROWTH REGULATION 53.1(2007):25-31.