Differential leaf stress responses in young and senescent plants

被引：41

作者：

Abarca, D ^{[1
]}

Martin, M ^{[1
]}

Sabater, B ^{[1
]}

机构：

[1] Univ Alcala de Henares, Fac Biol, Dept Biol Vegetal, E-28871 Alcala De Henares, Spain

来源：

PHYSIOLOGIA PLANTARUM | 2001年 / 113卷 / 03期

关键词：

D O I：

10.1034/j.1399-3054.2001.1130315.x

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Responses to low temperature, mechanical wounding and salicylic acid (SA) treatments were studied in 3-week-old (young) and 6-week-old (senescent) Arabidopsis thaliana (L.) Heynh. plants by analyzing increases in Pal1 and Pr1 expression and superoxide dismutase (SOD; EC 1.15.1.1) and peroxidase (POX; EC 1.11.1.7) activities. Young plants showed higher Pal1 transcript accumulation after low temperature and wounding. In contrast, senescent plants presented higher accumulation of Pr1 transcripts after SA treatments. Similar results were obtained with the ethylene-insensitive etr1 mutant, suggesting that these differences are not related to increased ethylene content in senescent tissues. SOD activity and inducibility were lower, whereas POX activity and inducibility were higher in senescent plants. A possible relationship between senescence-associated changes in responses to stress and in the metabolism of active oxygen species is discussed.

引用

页码：409 / 415

页数：7

共 50 条

[1]

ABARCA D, 2001, IN PRESS J EXP BOT

[2]

Ausubel F., 1990, CURRENT PROTOCOLS MO

[3] EXPRESSION OF NUCLEAR AND CHLOROPLAST PHOTOSYNTHESIS-SPECIFIC GENES DURING LEAF SENESCENCE [J].

BATE, NJ ;

ROTHSTEIN, SJ ;

THOMPSON, JE .

JOURNAL OF EXPERIMENTAL BOTANY, 1991, 42 (239) :801-811

[4]

Beauchamp C., 1971, ANAL BIOCHEM, V44, P276, DOI DOI 10.1016/0003-2697(71)90370-8

[5] Last exit: Senescence, abscission, and meristem arrest in Arabidopsis [J].

Bleecker, AB ;

Patterson, SE .

PLANT CELL, 1997, 9 (07) :1169-1179

[6] INSENSITIVITY TO ETHYLENE CONFERRED BY A DOMINANT MUTATION IN ARABIDOPSIS-THALIANA [J].

BLEECKER, AB ;

ESTELLE, MA ;

SOMERVILLE, C ;

KENDE, H .

SCIENCE, 1988, 241 (4869) :1086-1089

[7]

BOWLES DJ, 1990, ANNU REV BIOCHEM, V59, P873, DOI 10.1146/annurev.bi.59.070190.004301

[8]

BRADFORD MM, 1976, ANAL BIOCHEM, V72, P248, DOI 10.1016/0003-2697(76)90527-3

[9] The molecular biology of leaf senescence [J].

BuchananWollaston, V .

JOURNAL OF EXPERIMENTAL BOTANY, 1997, 48 (307) :181-199

[10] SENSITIVITY OF SUPEROXIDE-DISMUTASE TRANSCRIPT LEVELS AND ACTIVITIES TO OXIDATIVE STRESS IS LOWER IN MATURE-SENESCENT THAN IN YOUNG BARLEY LEAVES [J].

CASANO, LM ;

MARTIN, M ;

SABATER, B .

PLANT PHYSIOLOGY, 1994, 106 (03) :1033-1039

← 1 2 3 4 5 →