WorldWideScience
 
 
1

Fixation of CO_2 and export of photosynthate by the carpel in Pisum sativum  

International Nuclear Information System (INIS)

... School of Plant Biology. v. 23(2) p. 316-322. carbon dioxide absorption carbon

1970-01-01

2

Probing a Membrane Matrix Regulating Hormone Action  

UK PubMed Central (United Kingdom)

Auxin-induced pea (Pisum sativum) stem section elongation is enhanced at levels of 3 to 40 micromolar by six new classes of alkane derivatives additional to those described earlier,...Full Text Available

1971-11-01

3

Phytochrome, Nitrate Movement, and Induction of Nitrate Reductase in Etiolated Pea Terminal Buds 1  

UK PubMed Central (United Kingdom)

The role of phytochrome in the induction of nitrate reductase of etiolated field peas (Pisum arvense L.) was examined. Terminal bud nitrate concentration increased in darkness, and...Full Text Available

1975-06-01

4

Inhibitory Action of Auxin on Root Elongation Not Mediated by Ethylene  

UK PubMed Central (United Kingdom)

The inhibitory effects of indole-3-acetic acid (IAA) and 1-aminocyclopropane-1-carboxylic acid (ACC) on elongation growth of pea (Pisum sativum L.) seedling roots were investigated...Full Text Available

1989-09-01

5

Molecular Cloning and Evidence for Osmoregulation of the ?1-Pyrroline-5-Carboxylate Reductase (proC) Gene in Pea (Pisum sativum L.) 12  

UK PubMed Central (United Kingdom)

Several cDNA clones encoding Δ1-pyrroline-5-carboxylate reductase (P5CR, l-proline:NAD[P]+ 5-oxidoreductase, EC 1.5.1.2), which catalyzes the terminal step in...Full Text Available

1992-11-01

6

Metabolism of Gibberellin A12 and A12-Aldehyde in Developing Seeds of Pisum sativum L. 1  

UK PubMed Central (United Kingdom)

Metabolism of [14C]gibberellin (GA) A12 (GA12) and [14C]gibberellin A12-aldehyde (GA12-aldehyde) was examined in cotyledons and seed...Full Text Available

1991-09-01

7

Characterization of Fatty Acid Biosynthesis in Isolated Pea Root Plastids 1  

UK PubMed Central (United Kingdom)

Fatty acid biosynthesis from Na[1-14C]acetate was characterized in plastids isolated from primary roots of 7-day-old germinating pea (Pisum sativum L.) seeds. Fatty acid...Full Text Available

1991-06-01

8

Different modes of resource variation provide a critical test of ideal free distribution models  

British Library Electronic Table of Contents (United Kingdom)

Ideal free distribution (IFD) models are perhaps the group of mathematical models of behavior that have been the most widely and successfully applied by empiricists. These models can be applied to nearly any situation in which consumers compete?by any mechanism?for resources that are patchily distributed in their environment. Although IFD models have come to be broadly accepted, experiments that simultaneously test more than a single prediction are rare. Instead, investigators normally either test (1) for a relationship between the distribution of consumers and the distribution of resources or (2) whether average fitnesses are equal across resource patches. We conducted experiments with pea aphids (Acyrthosiphon pisum Harris) feeding on two patches of fava beans (Vicia faba L.) to fully in...

2007-01-01

9

Expression of ribosomal genes in pea cotyledons at the initial stages of germination  

Energy Technology Data Exchange (ETDEWEB)

The time of appearance of newly synthesized rRNAs and ribosomal proteins (r-proteins) in the ribosomes of pea cotyledons (Pisum sativum L.) during germination was investigated. The ribosomal fraction was isolated and analyzed according to the method of germination of the embryo in the presence of labeled precursors or after pulse labeling of the embryos at different stages of germination. For the identification of newly synthesized rRNAs in the ribosomes we estimated the relative stability of labeled RNAs to the action of RNase, the sedimentation rate, the ability to be methylated in vivo in the presence of (/sup 14/C)CH/sub 3/-methionine, and the localization in the subunits of dissociated ribosomes. The presence of newly synthesized r-proteins in the ribosomes was judged on the basis of the electrophoretic similarity in SDS-disc electrophoresis of labeled polypeptides of purified ribosome preparations and of genuine r-proteins, as well as according to the ...

1986-01-20

10

( sup 14 C)-Sucrose uptake by guard cell protoplasts of pisum sativum, argenteum mutant  

Energy Technology Data Exchange (ETDEWEB)

Guard cells rely on import for their supply with reduced carbon. The authors tested by silicone oil centrifugation the ability of guard cell protoplasts to accumulated ({sup 14}C)-sucrose. Uptake rates were corrected after measurement of {sup 14}C-sorbitol and {sup 3}H{sub 2}O spaces. Sucrose uptake followed biphasic kinetics, with a high-affinity component below 1 mM external sucrose (apparent K{sub m} 0.8 mM at 25C) and a low-affinity nonsaturable component above. Uptake depended on pH (optimum at pH 5.0). Variations in the concentrations of external KCl, CCCP, and valinomycin indicated that about one-half of the sucrose uptake rate could be related to an electrochemical gradient across the plasmalemma. Total uptake rates measured at 5 mM external sucrose seem to be sufficient to replenish emptied plastids with starch within a few hours.

1991-05-01