SOYBEAN LEAF NITROGEN IN RELATION TO PHOTOSYNTHETIC RATE AND YIELD

1988 ◽  
Vol 68 (3) ◽  
pp. 793-795 ◽  
Author(s):  
B. R. BUTTERY ◽  
R. I. BUZZELL
Keyword(s):  
Glycine Max ◽  
Photosynthetic Rate ◽  
Leaf Nitrogen ◽  
Glycine Max L ◽  
Soybean Leaf ◽  
Selection For ◽  
Field Experimentation ◽  
Degree Of Association ◽  
Leaf N

Field experimentation with soybean (Glycine max (L.) Merr.) indicated that leaf N, photosynthetic rate (PA) and yield are correlated. The degree of association is not strong and heritability for leaf N is not markedly greater than for PA or yield. Therefore, selection for leaf N to improve PA and/or yield would not be an advantageous approach.Key words: Soybean, leaf N, photosynthesis, yield

scholarly journals EFFECT OF LEAF AGE AND SHADING ON THE MOVEMENT OF 14C THROUGH A SOYBEAN LEAF

1981 ◽  
Vol 61 (2) ◽  
pp. 205-212
Author(s):  
L. R. BENJAMIN ◽  
D. B. EGLI ◽  
J. E. LEGGETT
Keyword(s):  
Glycine Max ◽  
Perchloric Acid ◽  
Soluble Fraction ◽  
Leaf Age ◽  
Maximum Level ◽  
Initial Activity ◽  
Glycine Max L ◽  
Soybean Leaf ◽  
Soluble Fractions

Experiments were conducted to evaluate the effect of leaf age and shading on the movement of 14C assimilates through soybean (Glycine max (L.) Merr.) leaves. Leaves on plants at initial bloom and mid-podfill were pulse-labelled with 14CO2 for 2 min and the distribution of 14C in the leaf was followed for 24 h. Initially, 90% of the 14C activity was in the 80% ethanol-soluble fraction; this decreased rapidly, and by 7 h after labeling only 10% of the initial activity was in this fraction. The 14C in starch and perchloric-acid-soluble fractions increased to a maximum level (approx. 30% of initial activity) 30 min after labeling and declined slowly over the rest of the period. After 24 h, approximately 80% of the 14C had moved out of the leaf. There was no effect of leaf age on the pattern of movement of 14C through the leaf. Completely shading the plant immediately after labeling resulted in a rapid cessation (within 30 mm) of 14C movement into starch with an accompanying retention of 14C in the 80% ethanol-soluble fraction.

scholarly journals Pengaruh Pemberian Kompos dan Pupuk NPK terhadap Produktivitas Kedelai (Glycine max (L.) Merril)

2019 ◽  
Vol 47 (2) ◽  
pp. 149-155
Author(s):  
Hapsoh , ◽  
Wardati , ◽  
Dan Hairunisa
Keyword(s):  
Glycine Max ◽  
Seed Weight ◽  
Block Design ◽  
Nutrient Content ◽  
Single Treatment ◽  
Glycine Max L ◽  
Npk Fertilizer ◽  
Leaf P ◽  
Number Of Seeds ◽  
Leaf N

The productivity of soybeans (Glycine max (L.) Merril) in Indonesia is still low, and therefore it is necessary to increase productivity through management of soil fertility such as fertilizer application. This study aimed to determine the effect of single compost, NPK, and their interactions on soybean productivity. The study was conducted in the experimental station of the Faculty of Agriculture, Universitas Riau from May to September 2017. The experiment used a factorial design arranged in a randomized block design. The first factor consisted of: without compost, oil palm empty fruit bunch compost (TKKS) and rice straw compost. The second factor consisted of: without NPK fertilizer, NPK dose 125 kg ha-1 and NPK dose 250 kg ha-1. Data analyzed statistically and further evaluation using Duncan’s multiple range test. The single treatment of compost increased the nutrient content of leaf N 3.1%, leaf K 24%, percentage of filled pods 3.45%, number of seeds each plant 14%, seed weight each plant 15% and weight of 100 seeds 3.20%. The single treatment of NPK fertilizer also increased leaf N by 4.67%, leaf P by 9% and leaf K by 4%, number of filled pods as 27%, percentage of filed pods with 5%, number of seeds each plant 29%, seed weight each plant 27%, production each m2 by 26% and weight 100 seeds by 7%. Interactions between treatments increased the levels of N, P, and K and percentage of filled pods. This research provides information for farmers to utilize compost in order to reduce the use of inorganic fertilizers.Keywords: filled pods, nutrient leaf content, leaf N level, leaf P level, seed weight

Effect of Genotype on the Photosynthetic Rate of Soybean ( Glycine max (L.) Merr.) 1

Crop Science ◽  
1969 ◽  
Vol 9 (4) ◽  
pp. 429-431 ◽  
Author(s):  
R. H. Dreger ◽  
W. A. Brun ◽  
R. L. Cooper
Keyword(s):  
Glycine Max ◽  
Photosynthetic Rate ◽  
Glycine Max L

INHERITANCE AND LINKAGE OF A MAGENTA FLOWER GENE IN SOYBEANS

1977 ◽  
Vol 19 (4) ◽  
pp. 749-751 ◽  
Author(s):  
R. I. Buzzell ◽  
B. R. Buttery ◽  
R. L. Bernard
Keyword(s):  
Glycine Max ◽  
Linkage Group ◽  
Photosynthetic Rate ◽  
Flower Color ◽  
Mutant Gene ◽  
Common Gene ◽  
Glycine Max L ◽  
Bean Yield ◽  
The Common

Magenta flower color in soybeans (Glycine max (L.) Merr.) was found to be controlled by a mutant gene, wm, in the presence of W1 which is the common gene for purple flowers. These two genes are closely linked (2.2 ± 0.7% recombination) and are members of what is proposed as Linkage Group 8. The wm reduces flavonol content of flowers and of leaves, and is a deleterious mutant in terms of photosynthetic rate and bean yield.

scholarly journals Development and soybean leaf consumption by Urbanus proteus proteus (L.)

2002 ◽  
Vol 59 (4) ◽  
pp. 661-663 ◽  
Author(s):  
Dori Edson Nava ◽  
José Roberto Postali Parra
Keyword(s):  
Glycine Max ◽  
Phaseolus Vulgaris ◽  
Control Level ◽  
Phaseolus Vulgaris L ◽  
Pupal Development ◽  
Leaf Consumption ◽  
Glycine Max L ◽  
Soybean Leaf ◽  
A Minor ◽  
Urbanus Proteus

Urbanus proteus proteus (L.) is a defoliating pest of legumes, causing damage mainly on soybean (Glycine max (L.) Merr.) and bean (Phaseolus vulgaris L.), and, being a minor pest, little is known about its bioecology. The objective of this paper was to study the larval and pupal development of the insect and the foliar consumption during its instars. Durations of 16.7; 1.1; 11.4 and 29.2 days were determined for the caterpillar, prepupal, and pupal stages, and the period from caterpillar-adult, respectively, with a total viability of 84.8%. The larval stage had five instars and the consumption of leaf area was 214.3 cm², with the consumption of the two last instars representing 96.9% of the total. Based on this value, the control level of the pest was estimated as 17 large caterpillars per sampling.

scholarly journals Selection for later flowering in soybean (Glycine max L.Merrill) F2 populations cultivated under short day conditions

1999 ◽  
Vol 22 (2) ◽  
pp. 243-247 ◽  
Author(s):  
Antonio Carlos Baião de Oliveira ◽  
Carlos Sigueyuki Sediyama ◽  
Cosme Damião Cruz
Keyword(s):  
Glycine Max ◽  
Direct Selection ◽  
Juvenile Period ◽  
Selection Strategies ◽  
Expected Gain ◽  
Natural Photoperiod ◽  
Glycine Max L ◽  
Natural Temperature ◽  
Selection For ◽  
Delayed Flowering

Several different selection strategies were used to estimate expected gain of days to flowering and other related characters in two F2 soybean (Glycine max (L.) Merrill) populations. The sample originated from crosses of lines whose seeds do not contain the three lipoxygenase isozymes with the commercially cultivated IAC-12. IAC-12 is a gene carrier for an extended juvenile period. This study was conducted during the winter of 1994 in Viçosa, Minas Gerais. The plants were grown under natural photoperiod. One population was grown in a heated greenhouse, and the other in the field under natural temperature conditions. Lower temperatures early in the field planting caused a delay in flowering. Delayed flowering caused a broader amplitude in all characters evaluated, and resulted in higher selection gains for the field-grown plants than for the greenhouse-grown plants. Direct selection for number of flowering days proved to be efficient for improving this character in both populations. Gains were also obtained for other characters. Interactions of temperature and photoperiod and temperature and genotypes affected soybean flowering time and produced alterations in other correlated agronomic characters, including productivity.

The Effects of Wounding and Mite Infestation on Soybean Leaf Lipoxygenase Levels

1989 ◽  
Vol 44 (7-8) ◽  
pp. 655-659 ◽  
Author(s):  
David F. Hildebrand ◽  
Juan G. Rodriguez ◽  
Cindy S. Legg ◽  
Grayson C. Brown ◽  
Gerhard Bookjans
Keyword(s):  
Glycine Max ◽  
Spider Mite ◽  
Fold Increase ◽  
Mite Infestation ◽  
Plant Tissues ◽  
Transcriptional Level ◽  
Twospotted Spider Mite ◽  
Glycine Max L ◽  
Soybean Leaf ◽  
Twospotted Spider

Numerous studies have demonstrated induction of proteins in plant tissues by wounding and infestations by various pests and pathogens. Lipoxygenase (LOX) is among the proteins that has been found to be induced by pathogens, but detailed information on the induction of LOX has not been reported. We have found a large (up to 10-fold) increase in LOX activity upon wounding of soybean (Glycine max L. Merr.) leaves and variable increases due to feeding of the twospotted spider mite. This induction in LOX activity was reflected in increases in amounts of both LOX protein and transcripts suggesting that the induction was at the transcriptional level. LOX activity was also found to be increased in unwounded leaves from plants with wounded leaves lower on the stem indicating that translocatable factors can cause remote induction of LOX activity.

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