Expression of the cucumber hydroxypyruvate reductase gene is down-regulated by elevated CO2

被引:8
作者
Bertoni, GP [1 ]
Becker, WM [1 ]
机构
[1] UNIV WISCONSIN,DEPT BOT,MADISON,WI 53706
关键词
D O I
10.1104/pp.112.2.599
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
We examined the effects of CO2 concentration on the white-light-stimulated expression of the cucumber (Cucumis sativus L.) Hpr gene. Hpr encodes hydroxypyruvate reductase, an enzyme important in the photorespiratory glycolate pathway, which plays an integral role in carbon allocation in C-3 plants. Because CO2 is an end product of this pathway and because increased CO2 concentrations lessen the need for photorespiration, we tested whether exposure of plants to elevated CO2 would affect white-light-stimulated Hpr gene expression. Exposure of dark-adapted cucumber seedlings to elevated CO2 (2 to 3 times ambient) during a 4-h white-light irradiation significantly inhibited the accumulation of Hpr mRNA. Increasing the CO2 concentration during irradiation to 6 or 9 times ambient did not further inhibit Hpr mRNA accumulation. The depressing effect of high CO2 on Hpr mRNA accumulation was seen in both high and low light, but was more pronounced in higher light. These results suggest that maximum sensitivity to CO2 occurs in conditions near those normally encountered by the plant (high light, CO2 concentration near ambient) and support a model in which white-light-regulated Hpr expression is modulated in part by environmental CO2 concentration.
引用
收藏
页码:599 / 605
页数:7
相关论文
共 22 条
[1]   EFFECTS OF LIGHT FLUENCE AND WAVELENGTH ON EXPRESSION OF THE GENE ENCODING CUCUMBER HYDROXYPYRUVATE REDUCTASE [J].
BERTONI, GP ;
BECKER, WM .
PLANT PHYSIOLOGY, 1993, 103 (03) :933-941
[2]   SINGLE-STEP METHOD OF RNA ISOLATION BY ACID GUANIDINIUM THIOCYANATE PHENOL CHLOROFORM EXTRACTION [J].
CHOMCZYNSKI, P ;
SACCHI, N .
ANALYTICAL BIOCHEMISTRY, 1987, 162 (01) :156-159
[3]  
CHORY J, 1991, NEW BIOL, V3, P538
[4]   PHOTORESPIRATION AND LIGHT ACT IN CONCERT TO REGULATE THE EXPRESSION OF THE NUCLEAR GENE FOR CHLOROPLAST GLUTAMINE-SYNTHETASE [J].
EDWARDS, JW ;
CORUZZI, GM .
PLANT CELL, 1989, 1 (02) :241-248
[5]  
Frankland B., 1986, Photomorphogenesis in plants, P219
[6]   ORGAN SPECIFICITY AND LIGHT REGULATION OF NADH-DEPENDENT HYDROXYPYRUVATE REDUCTASE TRANSCRIPT ABUNDANCE [J].
GREENLER, JM ;
BECKER, WM .
PLANT PHYSIOLOGY, 1990, 94 (03) :1484-1487
[7]   ISOLATION, CHARACTERIZATION AND SEQUENCE-ANALYSIS OF A FULL-LENGTH CDNA CLONE ENCODING NADH-DEPENDENT HYDROXYPYRUVATE REDUCTASE FROM CUCUMBER [J].
GREENLER, JM ;
SLOAN, JS ;
SCHWARTZ, BW ;
BECKER, WM .
PLANT MOLECULAR BIOLOGY, 1989, 13 (02) :139-150
[8]   LIGHT-STIMULATED ACCUMULATION OF THE PEROXISOMAL ENZYMES HYDROXYPYRUVATE REDUCTASE AND SERINE - GLYOXYLATE AMINOTRANSFERASE AND THEIR TRANSLATABLE MESSENGER-RNAS IN COTYLEDONS OF CUCUMBER SEEDLINGS [J].
HONDRED, D ;
WADLE, DM ;
TITUS, DE ;
BECKER, WM .
PLANT MOLECULAR BIOLOGY, 1987, 9 (03) :259-275
[9]   THE OXIDATIVE PHOTOSYNTHETIC CARBON-CYCLE OR C2 CYCLE [J].
HUSIC, DW ;
HUSIC, HD ;
TOLBERT, NE .
CRC CRITICAL REVIEWS IN PLANT SCIENCES, 1987, 5 (01) :45-100
[10]   REGULATION OF THE BACILLUS-ANTHRACIS PROTECTIVE ANTIGEN GENE - CO2 AND A TRANS-ACTING ELEMENT ACTIVATE TRANSCRIPTION FROM ONE OF 2 PROMOTERS [J].
KOEHLER, TM ;
DAI, ZH ;
KAUFMANYARBRAY, M .
JOURNAL OF BACTERIOLOGY, 1994, 176 (03) :586-595