Retardation of leaf senescence by benzyladenine in bean plants is not dependent on mobilization

1971 ◽  
Vol 49 (1) ◽  
pp. 59-61 ◽  
Author(s):  
N. O. Adedipe ◽  
R. A. Fletcher
Keyword(s):  
Leaf Senescence ◽  
Total Radioactivity ◽  
Intact Plants ◽  
Bean Plants ◽  
Opposite Leaf

Application of benzyladenine (BA) to portions of a bean leaf either along or across the midvein or to one of the two primary leaves, on intact plants, retarded senescence of the treated part. When 14carbon labeled CO2, IAA, leucine, or sucrose was fed to the untreated part on the same leaf, or to the untreated opposite leaf, there was less than 2% of the total radioactivity in the BA treated part after 24 h. It is concluded that retardation of leaf senescence by BA on intact bean plants is not dependent on mobilization of metabolites from other parts of the leaf.

The Effects of Cotyledon Excision on Growth and Leaf Senescence in Soya-bean Plants

1977 ◽  
Vol 41 (4) ◽  
pp. 771-777 ◽  
Author(s):  
H. F. CHIN ◽  
T. F. NEALES ◽  
J. H. WILSON
Keyword(s):  
Leaf Senescence ◽  
Soya Bean ◽  
Bean Plants

Retardation of leaf senescence by benzyladenine in intact bean plants

Planta ◽  
1969 ◽  
Vol 89 (1) ◽  
pp. 1-8 ◽  
Author(s):  
R. A. Fletcher
Keyword(s):  
Leaf Senescence ◽  
Bean Plants

scholarly journals EFEITO DA LÂMINA DE IRRIGAÇÃO NA SENESCÊNCIA FOLIAR DO FEIJOEIRO

Irriga ◽  
2007 ◽  
Vol 12 (4) ◽  
pp. 557-568 ◽  
Author(s):  
Reimar Carlesso ◽  
Sidnei Osmar Jadoski ◽  
Marcio Furlan Maggi ◽  
Mirta Petry ◽  
Dolores Wolshick
Keyword(s):  
Leaf Senescence ◽  
Water Depth ◽  
Irrigation Water ◽  
Area Index ◽  
Agricultural Engineering ◽  
Randomized Design ◽  
Bean Plants ◽  
Engineering Department ◽  
Irrigation Depth ◽  
Santa Maria

EFEITO DA LÂMINA DE IRRIGAÇÃO NA SENESCÊNCIA FOLIAR DO FEIJOEIRO  Reimar Carlesso1; Sidnei Osmar Jadoski2; Marcio Furlan Maggi2; Mirta Petry3; Dolores Wolshick31Departamento de Engenharia Rural, Centro de Ciências Ruruais, Universidade Federal de Santa Maria, Santa Maria, RS, [email protected] de Agronomia, Universidade Estadual do Centro Oeste-UNICENTRO, Guarapuava, PR 3Departamento de Agronomia, Universidade Federal do Paraná, Curitiba, PR  1 RESUMO Com este trabalho, objetivou-se avaliar as variações na morfologia das plantas de feijoeiro frente a diferentes lâminas de irrigação. O experimento foi conduzido no Departamento de Engenharia Rural da Universidade Federal de Santa Maria,RS. A cultivar de feijão preto BR-FEPAGRO 44 – Guapo brilhante (tipo II) foi submetida a quatro regimes hídricos visando elevar o conteúdo de água no solo ao limite superior de disponibilidade às plantas, quando a evapotranspiração máxima da cultura indicava lâminas acumuladas de 15, 30, 45 ou60 mm. Utilizou-se delineamento experimental inteiramente casualizado com cinco repetições. Com os resultados verificou-se que a partir da fase de pleno florescimento, os maiores valores de índice de área foliar e altura das plantas foram alcançados através do uso de irrigações mais freqüentes com menores lâminas. Observou-se efeito significativo da irrigação sobre a altura das vagens inferiores em relação à superfície do solo, porém, não sobre o número de nós e comprimento dos entrenós na haste principal das plantas. A irrigação com aplicação de lâmina crítica de45 mmdeterminada a partir da evapotranspiração máxima acumulada da cultura, limitou severamente a expansão do dossel vegetativo das plantas.  UNITERMOS: feijão, lâmina de irrigação, deficiência hídrica, senescência foliar  CARLESSO, R.; JADOSKI, S. O.; MAGGI, M. F.; PETRY, M.; WOLSHICK, D. BEAN LEAF SENESCENCE UNDER DIFFERENT IRRIGATION WATER DEPTH  2 ABSTRACT The objective of this study was to evaluate the application effects  of different irrigation depths based on the maximum crop evapotranspiration (ETm), on morphological modifications of bean plants. The senescence experiment was conducted in the Agricultural Engineering Department of Federal University ofSanta Maria. The variety BR-FEPAGRO 44 (type II) was submitted to four irrigation water managements. The irrigation treatments were based on the ETm (15, 30, 45 and60 mm, obtained from the class A pan evaporation) and distributed in a completely randomized design, with five replications. The results demonstrated that leaf area index and plant height increased with the reduction of irrigation application depth after plant anthesis. The irrigation water depth affected the tip height of the first pod, however, the number of nodes per stem and internodes length was not affected. The irrigation water management with the application of irrigation depth of45 mmdecreased severely the vegetative growth of plants. KEYWORDS: bean, irrigation depth, drought stress, leaf senescence

scholarly journals Leaf senescence of common bean plants as affected by soil phosphorus supply

2007 ◽  
Vol 31 (3) ◽  
pp. 499-506 ◽  
Author(s):  
Adelson Paulo Araújo ◽  
Flavio Yuudi Kubota ◽  
Marcelo Grandi Teixeira
Keyword(s):  
Common Bean ◽  
Leaf Senescence ◽  
Growth Cycle ◽  
Leaf Number ◽  
Initial Increase ◽  
Soil P ◽  
Bean Plants ◽  
Senesced Leaves ◽  
P Supply ◽  
Common Bean Plants

Responses of leaf senescence to P supply could constitute adaptive mechanisms for plant growth under P-limiting conditions. The aim of this study was to evaluate the effects of soil P supply on leaf senescence of common bean (Phaseolus vulgaris L.). Eight P levels, ranging from 5 to 640 mg kg-1 P, were applied to pots containing four bean plants of cultivar Carioca in 10 kg of an Oxic Haplustult soil. Attached leaves were counted weekly, abscised leaves were collected every other day, and seeds were harvested at maturity. The number of live leaves increased until 48 days after emergence (DAE) and decreased afterwards, irrespective of applied P levels. At lower applied P levels, the initial increase and the final decrease of leaf number was weak, whereas at higher applied P levels the leaf number increased intensively at the beginning of the growth cycle and decreased strongly after 48 DAE. Dry matter and P accumulated in senesced leaves increased as soil P levels increased until 61 DAE, but differences between P treatments narrowed thereafter. The greatest amounts of dry mass and P deposited by senesced leaves were observed at 48-54 DAE for high P levels, at 62-68 DAE for intermediate P levels and at 69-76 DAE for low P levels. These results indicate that soil P supply did not affect the stage of maximal leaf number and the beginning of leaf senescence of common bean plants, but the stage of greatest deposition of senesced leaves occurred earlier in the growth cycle as the soil P supply was raised.

scholarly journals The Effect of Water Stress On [14c]Sucrose Transport in Bean Plants

1965 ◽  
Vol 18 (6) ◽  
pp. 1143 ◽  
Author(s):  
Z Plaut ◽  
Leonora Reinhold
Keyword(s):  
Water Stress ◽  
Primary Leaf ◽  
Sucrose Transport ◽  
Plant Parts ◽  
Effect Of Water ◽  
Bean Plants ◽  
Treated Leaf ◽  
Opposite Leaf ◽  
And Control

The passage of 14C through stressed and control bean seedlings has been followed after supply of [14C]sucrose to a primary leaf. The course of synthesis of [14C]sucrose into non-ethanol-soluble compounds in the various plant parts was also investigated. Concomitant measurements of relative turgidity were made either on part of the 14C-treated leaf or on the twin opposite leaf.

scholarly journals Effect of Botrytis cinerea infection and elicitation on ß-1,3-glucanase and chitinase activity in bean leaves and cell cultures

2013 ◽  
Vol 47 (2) ◽  
pp. 63-71 ◽  
Author(s):  
Elżbieta Kuźniak ◽  
Henryk Urbanek ◽  
Aneta Michalak ◽  
Katarzyna Herka
Keyword(s):  
Botrytis Cinerea ◽  
Cell Cultures ◽  
Culture Filtrate ◽  
Chitinase Activity ◽  
Intact Plants ◽  
Culture Filtrates ◽  
Bean Plants ◽  
Bean Leaves

The activity of ß-1,3-glucanase and chitinase in bean plants treated with <i>B. cinerea</i> products or/and infected and in cell cultures after application of fungal products has been studied. <i>Botrytis cinerea</i> infection and culture filtrates, ethanol precipitates, glucan and conidial extract treatment markedly enhanced the activity of both hydrolases. Cell cultures treated with <i>B.cinerea</i> products reacted similarly to intact plants. In plants pretreated with 2-day culture filtrate and conidial extract and then infected, ß-1,3-glucanase and chitinase were induced stronger than after infection without pretreatment.

Freeze-Fracture Studies of Membranes in Developing Sieve Elements in a Plant Tissue Culture

1980 ◽  
Vol 38 ◽  
pp. 636-637
Author(s):  
R. D. Sjolund ◽  
C. Y. Shih
Keyword(s):  
Plant Tissue ◽  
Cultured Cells ◽  
Freeze Fracture ◽  
Tissue Cultures ◽  
Sieve Elements ◽  
Intact Plants ◽  
Plant Tissue Cultures ◽  
Whole Plants ◽  
Energy Dependent ◽  
Similar Elements

The differentiation of phloem in plant tissue cultures offers a unique opportunity to study the development and structure of sieve elements in a manner that avoids the injury responses associated with the processing of similar elements in intact plants. Short segments of sieve elements formed in tissue cultures can be fixed intact while the longer strands occuring in whole plants must be cut into shorter lengths before processing. While iyuch controversy surrounds the question of phloem function in tissue cultures , sieve elements formed in these cultured cells are structurally similar to those of Intact plants. We are particullarly Interested In the structure of the plasma membrane and the peripheral ER in these cells because of their possible role in the energy-dependent active transport of sucrose into the sieve elements.

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