Format

Send to

Choose Destination
Ann Bot. 2013 Dec;112(9):1879-85. doi: 10.1093/aob/mct223. Epub 2013 Oct 17.

Linking ethylene to nitrogen-dependent leaf longevity of grass species in a temperate steppe.

Author information

1
State Key Laboratory of Forest and Soil Ecology, Institute of Applied Ecology, The Chinese Academy of Sciences, Shenyang, 110164, China.

Abstract

BACKGROUND AND AIMS:

Leaf longevity is an important plant functional trait that often varies with soil nitrogen supply. Ethylene is a classical plant hormone involved in the control of senescence and abscission, but its role in nitrogen-dependent leaf longevity is largely unknown.

METHODS:

Pot and field experiments were performed to examine the effects of nitrogen addition on leaf longevity and ethylene production in two dominant plant species, Agropyron cristatum and Stipa krylovii, in a temperate steppe in northern China.

KEY RESULTS:

Nitrogen addition increased leaf ethylene production and nitrogen concentration but shortened leaf longevity; the addition of cobalt chloride, an ethylene biosynthesis inhibitor, reduced leaf nitrogen concentration and increased leaf longevity. Path analysis indicated that nitrogen addition reduced leaf longevity mainly through altering leaf ethylene production.

CONCLUSIONS:

These findings provide the first experimental evidence in support of the involvement of ethylene in nitrogen-induced decrease in leaf longevity.

KEYWORDS:

Agropyron cristatum; Inner Mongolia; Stipa krylovii; ethylene production; grassland; leaf life span; leaf nitrogen; nitrogen addition

PMID:
24136876
PMCID:
PMC3838550
DOI:
10.1093/aob/mct223
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Silverchair Information Systems Icon for PubMed Central
Loading ...
Support Center