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1. Effect of K application on leaf carbonic anhydrase and nitrate reductase activities, photosynthetic characteristics, NPK and NO3 contents, growth, and yield of mustard

Creator:
Mohammad, F. and Naseem, U.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
Brassica juncea, leaf area, oil content, pod, seed yield, and stomatal conductance
Language:
Multiple languages
Description:
In a sand culture experiment on mustard (Brassica juncea L. Czern. & Coss) cv. Varuna, all tested characteristics at 60 d stage and yield characteristics at harvest were enhanced by K application as its levels increased from 5 to 10, 15, 20, 25, and 30 mM K, with 20 mM K proving best. and F. Mohammad, U. Naseem.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Net photosynthetic rate in peanut (Arachis hypogaea L.): Influence of leaf position, time of day, and reproductive-sink

Creator:
Nautiyal, P. C., Ravindra, V., and Joshi, Y. C.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
chlorophyll, dry mass, leaf number and area, peg, pod, saccharides, stomatal conductance, temperature, and transpiration
Language:
Multiple languages
Description:
Net photosynthetic rate (PN) was studied in field-grown peanut cv. GG 2 in relation to leaf position, time of day, reproductive-sink, and phenophase. In general, PN remained higher in the upper leaves (first from top to the fourth) than in the lower leaves (fifth to eighth). The mean PN of the leaves situated upper and the leaves lower in the canopy increased from the morning, reached a maximum during noon hours, and decreased thereafter. Between 09:00 to 10:00 h, PN, stomatal conductance (gs), and transpiration rate (E) in the upper leaves were higher than in the lower leaves, but between 12:00 and 13:00 h, these activities increased significantly in the lower leaves. Highest PN was found during pod-development phase. Removal of flowers, and hence of active reproductive-sink, decreased plant height and number of leaves, and initiated accumulation of photosynthates in the leaves. The PN per unit leaf area in plants with reproductive-sink (WRS) was similar to those without reproductive-sink (WORS). However, leaf area of WORS plants decreased significantly, mainly due to the reduction in number of leaves. No feed-back inhibition of PN (per unit leaf area) was found despite accumulation of photosynthates in the leaves as a result of removal of the active reproductive-sink. and P. C. Nautiyal, V. Ravindra, Y. C. Joshi.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

3. Photosynthetic efficiency of plants of Brassica juncea, treated with chlorosubstituted auxins

Creator:
A., Ahmad, Hayat, S., Fariduddin, Q., and Ahmad, I.
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
carbonic anhydrase, carboxylation efficiency, chloroindole auxins, chlorophyll, net photosynthetic ate, nitrate reductase, pod, and seed yield
Language:
Multiple languages
Description:
The leaves of 29-d-old plants of Brassica juncea Czern & Coss cv. Varuna were sprayed with 10-6 or 10-8 M aqueous solutions of indole-3-yl-acetic acid (IAA) or its substituted derivatives 4-Cl-IAA, 7-Cl-IAA, and 4,7-Cl2-IAA. All the auxins improved the vegetative growth and seed yield at harvest compared with those sprayed with de-ionised water (control). 4-Cl-IAA was most prominent in its effect, generating 21.6, 39.7, 61.0, 35.0, 65.5, and 56.2% higher values for dry mass, leaf chlorophyll content, carbonic anhydrase (E.C. 4.2.1.1) and nitrate reductase (E.C. 1.6.6.1) activities, net photosynthetic rate, and carboxylation efficiency, respectively, in 60-d-old plants. It also enhanced the seed yield by 31.1% over the control. The order of response of the plants to various auxins was 4-Cl IAA ≥ 7-Cl IAA > 4,7-Cl2 IAA = IAA > control.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

4. Vacuole cysteine proteases and ribulose-1,5-bisphosphate carboxylase/oxygenase degradation during monocarpic senescence in cowpea leaves

Creator:
Srivalli, B., Bharti, Sudhakar, and Khanna-Chopra, Renu
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
endopeptidase, iodoacetamide, net photosynthetic rate, D,L-norleucine, phenyl methyl sulphonyl fluoride, pod, proteins, and Vigna unguiculata
Language:
Multiple languages
Description:
Characterisation of proteases degrading ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPCO, EC: 4.1.1.39) was studied in the cowpea leaf during monocarpic senescence 3 and 9 d after flowering (DAF), representing early and mid pod fill. The stage at 3 DAF coincided with decrease in the metabolic parameters characterising senescence, i.e., contents of total soluble proteins, RuBPCO, and leaf nitrogen. At 9 DAF, there was a decline in total soluble proteins and an appearance of a 48 kDa cysteine protease. Characterisation of the proteases was done using specific inhibitors. Subcellular localisation at 3 DAF was studied by following the degradation of RuBPCO large subunit (LSU) in the vacuole lysates using immunoblot analyses. Cysteine proteases played a predominant role in the degradation of RuBPCO LSU at the crude extract level. At 9 DAF, expression of cysteine protease isoforms was monitored using polyclonal antibodies against papain and two polypeptides of molecular masses 48 and 35 kDa were observed in the vacuole lysates. We confirmed thus the predominance of cysteine proteases in the vacuoles during different stages of pod development in cowpea leaf. and B. Srivalli, Sudhakar Bharti, Renu Khanna-Chopra.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public