Abstract:
:The interaction of low water potential effects on photosynthesis, and leaf K(+) levels in wheat (Triticum aestivum L.) plants was studied. Plants were grown at three K(+) fertilization levels; 0.2, 2, and 6 millimolar. With well watered plants, 2 millimolar K(+) supported maximal photosynthetic rates; 0.2 millimolar K(+) was inhibitory, and 6 millimolar K(+) was superoptimal (i.e. rates were no greater than at 2 millimolar K(+)). Photosynthesis was monitored at high (930 parts per million) and low (330 parts per million) external CO(2) throughout a series of water stress cycles. Plants subjected to one stress cycle were considered nonacclimated; plants subjected to two successive cycles were considered acclimated during the second cycle. Sensitivity of photosynthesis to declining leaf water potential was affected by K(+) status; 6 millimolar K(+) plants were less sensitive, and 0.2 millimolar K(+) plants were more sensitive than 2 millimolar K(+) plants to declining water potential. This occurred with nonacclimated and acclimated plants at both high and low assay CO(2). It was concluded that the K(+) effect on photosynthesis under stress was not mediated by treatment effects on stomatal resistance. Differences between the K(+) treatments were much less pronounced, however, when photosynthesis of nonacclimated and acclimated plants was plotted at a function of declining relative water content during the stress cycles. These results suggest that K(+) effects on the relationship between relative water content and water potential in stressed plants was primarily responsible for the bulk of the K(+)-protective effect on photosynthesis in stressed plants. In vitro experiments with chloroplasts and protoplasts isolated from 2 millimolar K(+) and 6 millimolar K(+) plants indicated that upon dehydration, K(+) efflux from the chloroplast stroma into the cytoplasm is less pronounced in 6 millimolar K(+) protoplasts.
journal_name
Plant Physioljournal_title
Plant physiologyauthors
Gupta AS,Berkowitz GA,Pier PAdoi
10.1104/pp.89.4.1358subject
Has Abstractpub_date
1989-04-01 00:00:00pages
1358-65issue
4eissn
0032-0889issn
1532-2548journal_volume
89pub_type
杂志文章相关文献
PLANT PHYSIOLOGY文献大全abstract::Drought stress is one of the main environmental problems encountered by crop growers. Reduction in arable land area and reduced water availability make it paramount to identify and develop strategies to allow crops to be more resilient in water-limiting environments. The plant hormone abscisic acid (ABA) plays an impo...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.17.01072
更新日期:2017-11-01 00:00:00
abstract::Some clones of Spirodela polyrrhiza form dormant bodies called turions which require several weeks of chilling treatment before they proceed to renew growth and develop into vegetative fronds. The individual fronds of Spirodela are less than 5 mm long and can be grown aseptically in liquid culture. Turion formation an...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.11.1866
更新日期:1968-11-01 00:00:00
abstract::Isolated soybean leaf mesophyll cells decarboxylated exogenously added [1-(14)C]glycolate and [1-(14)C]glycine in the dark. The rate of CO(2) release from glycine was inhibited over 90% by isonicotinic acid hydrazide and about 80% by KCN, two inhibitors of the glycine to serine plus CO(2) reaction. The release of CO(2...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.64.6.1048
更新日期:1979-12-01 00:00:00
abstract::Acetophenones are phenolic compounds involved in the resistance of white spruce (Picea glauca) against spruce budworm (Choristoneura fumiferiana), a major forest pest in North America. The acetophenones pungenol and piceol commonly accumulate in spruce foliage in the form of the corresponding glycosides, pungenin and ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.17.00611
更新日期:2017-10-01 00:00:00
abstract::Fresh weight, protein, cysteine, [gamma]-glutamylcysteine, glutathione, and the extractable activity of the enzymes of glutathione biosynthesis, [gamma]-glutamylcysteine synthetase (EC 6.3.2.2) and glutathione synthetase (EC 6.3.2.3), were measured in roots, scutella, endosperms, and shoots of 3-, 7-, and 11-d-old mai...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.101.2.561
更新日期:1993-02-01 00:00:00
abstract::The occurrence of proteins able to oxidize polyphenols even in the absence of H2O2 was recently reported in mung bean (Vigna radiata L.) hypocotyl cell wall extracts (R. Goldberg, A. Chabanet, A.M. Catesson [1993] In K.G. Welinder, S.K. Rasmussen, C. Penel, H. Greppin, eds, Plant Peroxidases: Biochemistry and Physiolo...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.106.3.1095
更新日期:1994-11-01 00:00:00
abstract::The conversion of l-glutamate to delta-aminolevulinate, in preparations of cucumber etiochloroplasts incubated in vitro, was inhibited by protoheme IX and Mg-protoporphyrin IX. Mg-protoporphyrin IX was destroyed in the presence of air and plastids; this breakdown was accelerated by S-adenosyl methionine. Mg-protoporph...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.69.1.112
更新日期:1982-01-01 00:00:00
abstract::Systemic acquired resistance (SAR) is a plant immune response to pathogen attack. Recent evidence suggests that plant immunity involves regulation by chromatin remodeling and DNA methylation. We investigated whether SAR can be inherited epigenetically following disease pressure by Pseudomonas syringae pv tomato DC3000...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.111.187468
更新日期:2012-02-01 00:00:00
abstract::The effect of external CO2 concentration on the expression of carbonic anhydrase (CA) and ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) was examined in pea (Pisum sativum cv Little Marvel) leaves. Enzyme activities and their transcript levels were reduced in plants grown at 1000 [mu]L/L CO2 compared with p...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.112.2.569
更新日期:1996-10-01 00:00:00
abstract::Some properties of ornithine carbamoyltransferase from chloroplasts isolated from leaves of Pisum sativum L. (cv Marzia) were compared with those of the enzyme partially purified (316-fold) from shoots of seedlings after 3 weeks of cultivation.Both preparations showed a pH optimum at pH 8.3 and had the same affinity t...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.77.3.695
更新日期:1985-03-01 00:00:00
abstract::The long-day plant Arabidopsis thaliana (L.) Heynh. flowers early in response to brief end-of-day (EOD) exposures to far-red light (FR) following a fluorescent short day of 8 h. FR promotion of flowering was nullified by subsequent brief red light (R) EOD exposure, indicating phytochrome involvement. The EOD response ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.108.4.1495
更新日期:1995-08-01 00:00:00
abstract::The canonical pathway for isoleucine biosynthesis in plants begins with the conversion of threonine to 2-ketobutyrate by threonine deaminase (OMR1). However, demonstration of methionine gamma-lyase (MGL) activity in Arabidopsis (Arabidopsis thaliana) suggested that production of 2-ketobutyrate from methionine can also...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.109.138651
更新日期:2009-09-01 00:00:00
abstract::Under stress conditions such as high light intensity or nutrient starvation, cells of the unicellular alga Dunaliella bardawil overproduce beta-carotene, which is accumulated in the plastids in newly formed triacylglycerol droplets. We report here that the formation of these sequestering structures and beta-carotene a...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.116.4.1239
更新日期:1998-04-01 00:00:00
abstract::Under controlled environment and/or field conditions, vegetative growth (height, internode length, leaf area, shoot dry weight, grain yield) was greater in an F(1) maize hybrid than in either parental inbred. Endogenous gibberellin (GA)-like substances in apical meristem cylinders were also higher in the hybrid than i...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.71.3.639
更新日期:1983-03-01 00:00:00
abstract::The relationship between the rate of orthophosphate (Pi) transport into the stroma and the rate of CO(2) fixation by intact chloroplasts was investigated. High Pi concentrations in the medium lead to a depletion of stromal metabolites, due to excessive Pi transport into the stroma, resulting in the inhibition of CO(2)...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.65.4.574
更新日期:1980-04-01 00:00:00
abstract::The inhibitory effect of NH4+ on net NO3- uptake has been attributed to an enhancement of efflux and, recently, to an inhibition of influx. To study this controversy, we devised treatments to distinguish the effects of NH4+ on these two processes. Roots of intact barley (Hordeum vulgare L.) seedlings, uninduced or ind...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.106.4.1293
更新日期:1994-12-01 00:00:00
abstract::Onion (Allium cepa L.) bulbs were frozen to -4 and -11 C and kept frozen for up to 12 days. After slow thawing, a 2.5-cm square from a bulb scale was transferred to 25 ml deionized H(2)O. After shaking for standard times, measurements were made on the effusate and on the effused cells. The results obtained were as fol...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.60.3.393
更新日期:1977-09-01 00:00:00
abstract::Addition of excess copper to nongrowing cells of a normal, green Chlorella caused a reduction in total pigments and a blue shift of chlorophyll absorption, concurrent with the inhibition of photosynthesis. Chlorophylless yellow and white mutant strains of the same alga showed a rise in nonspecific absorption (i.e., ch...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.46.2.183
更新日期:1970-08-01 00:00:00
abstract::The NB mitochondrial genome found in most fertile varieties of commercial maize (Zea mays subsp. mays) was sequenced. The 569,630-bp genome maps as a circle containing 58 identified genes encoding 33 known proteins, 3 ribosomal RNAs, and 21 tRNAs that recognize 14 amino acids. Among the 22 group II introns identified,...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.104.044602
更新日期:2004-11-01 00:00:00
abstract::Heat treatment (37 degrees C) of transgenic tobacco (Nicotiana tabacum) plants led to a reversible reduction or complete loss of transgene-encoded activities in about 40% of 10 independent transformants carrying the luciferase-coding region fused to the 355 cauliflower mosaic virus or the soybean small subunit promote...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.115.3.939
更新日期:1997-11-01 00:00:00
abstract::Spike number per unit area, number of grains per spike, and thousand kernel weight (TKW) are important yield components. In China, increases in wheat (Triticum aestivum) yields are mainly due to increases in grain number per spike and TKW. TKW mainly depends on starch content, as starch accounts for about 70% of the g...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.113.232454
更新日期:2014-04-01 00:00:00
abstract::Abscisic acid (ABA), auxins, cytokinins, gibberellic acid, alone or in combination were tested for their effects on short-term sucrose uptake in sugar beet (Beta vulgaris cv USH-20) roots. The effect of ABA on active sucrose uptake varied from no effect to the more generally observed 1.4-to 3.0-fold stimulation. A rac...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.74.4.951
更新日期:1984-04-01 00:00:00
abstract::Short exposure of the spores of Cheilanthes farinosa to low intensity red light promotes their germination, which is not reversed by a subsequent exposure to far red light. Germination is, however, inhibited by blue light administered before or after red light. Inhibition of germination by blue light is annulled by ex...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.51.2.306
更新日期:1973-02-01 00:00:00
abstract::Starch production in all plants examined is altered by mutations of isoamylase-type starch-debranching enzymes (DBE), although how these proteins affect glucan polymer assembly is not understood. Various allelic mutations in the maize (Zea mays) gene sugary1 (su1), which codes for an isoamylase-type DBE, condition dis...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.125.3.1406
更新日期:2001-03-01 00:00:00
abstract::Plant cystatins are inhibitors of cysteine-proteases of the papain C1A and legumain C13 families. Cystatin data from multiple plant species have suggested that these inhibitors act as defense proteins against pests and pathogens and as regulators of protein turnover. In this study, we characterize the entire cystatin ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.109.146019
更新日期:2009-11-01 00:00:00
abstract::Abscisic acid (ABA) is an important phytohormone regulating various cellular processes in plants, including stomatal opening and seed germination. Although protein phosphorylation via mitogen-activated protein kinases (MAPKs) has been suggested to be important in ABA signaling, the corresponding phosphatases are large...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.110.156109
更新日期:2010-07-01 00:00:00
abstract::In this study, we generated transgenic Arabidopsis (Arabidopsis thaliana) plants overexpressing the Rieske FeS protein (PetC), a component of the cytochrome b6f (cyt b6f) complex. Increasing the levels of this protein resulted in concomitant increases in the levels of cyt f (PetA) and cyt b6 (PetB), core proteins of t...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.17.00622
更新日期:2017-09-01 00:00:00
abstract::Plant growth and development are strongly dependent on sink-source interactions. In the majority of plants, sucrose (Suc) is the dominant form in which photo-assimilate is transported from source to sinks. Although the effects of Suc on photosynthetic metabolism have been intensively studied, the effect of Suc supply ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.103.024802
更新日期:2003-10-01 00:00:00
abstract::The addition of primary amines to the growth medium of the unicellular green alga Chlamydomonas reinhardtii disrupts cell wall assembly in both vegetative and zygotic cells. Primary amines are competitive inhibitors of the protein-cross-linking activity of transglutaminases. Two independent assays for transglutaminase...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.121.3.1003
更新日期:1999-11-01 00:00:00
abstract::Tomato Atypical Receptor Kinase 1 (TARK1) is a pseudokinase required for postinvasion immunity. TARK1 was originally identified as a target of the Xanthomonas euvesicatoria effector protein Xanthomonas outer protein N (XopN), a suppressor of early defense signaling. How TARK1 participates in immune signal transduction...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.19.01400
更新日期:2020-07-01 00:00:00