+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Regulation of senescence by benzylaminopurine and uniconazole in intact and excised soybean cotyledons

Regulation of senescence by benzylaminopurine and uniconazole in intact and excised soybean cotyledons

Plant Physiology & Biochemistry 31(6): 827-834

The influence of benzylaminopurine (BA) and uniconazole (UCZ) on the senescence of 14-day-old soybean (Glycine max) was examined by treating cotyledons on intact plants or excised cotyledon discs. Senescence of the cotyledons, measured as the loss of chlorophylls (Chl) a and b, carotenoids, protein and increased membrane leakiness, was more rapid in the excised system. In both systems there were high positive correlations among the conversion of exogenous ACC (1-aminocyclopropane-1-carboxylic acid) to ethylene, lipoxygenase (EC (LOX) activity and Chl a levels which declined as the cotyledons senesced. However, these correlations were not evident in the BA-treated cotyledons which had relatively high Chl levels. Therefore the results of this study do not support the contention that LOX activity, ACC conversion and senescence are interrelated. In both systems BA was more effective in delaying senescence compared to the control and UCZ-treated cotyledons. In the excised system UCZ tended to hasten while in the intact system UCZ delayed senescence. This study demonstrates that UCZ acts as an anti-senescence agent when applied to intact plants and the implications of this in postharvest physiology warrants further investigation.

Please choose payment method:

(PDF emailed within 1 workday: $29.90)

Accession: 002477261

Download citation: RISBibTeXText

Related references

Senescence of cucurbita maxima cotyledons and the effect of gibberellic acid and potassium nitrate on the excised cotyledons. Journal of the Indian Botanical Society 56(4): 275-277, 1977

The effects of benzylaminopurine on growth and carbon translocation in excised mustard cotyledons. 1970

A rapid and selective action of 6-benzylaminopurine on 5-aminolevulinate production in excised sunflower cotyledons. Plant science letters 16(4): 397-402, 1979

The regulation of mitochondrial activity during greening and senescence of soybean cotyledons. Plant Physiology & Biochemistry 27(6): 827-836, 1989

Effects of 6 benzylaminopurine and potassium on delta aminolevulinate dehydratase activity of excised cucumber cotyledons. Plant & Cell Physiology 28(3): 431-438, 1987

Effects of benzylaminopurine and abscisic acid on distribution of rRNA in the palisade cells of excised Cucurbita pepo cotyledons. Biologia Plantarum 44(3): 355-360, 2001

Effect of uniconazole on transpiration of excised soybean leaves. Current Science 59(3): 167-168, 1990

Effect of methyl ester of jasmonic acid and benzylaminopurine on growth and protein profile of excised cotyledons of Cucurbita pepo (zucchini). Biologia Plantarum 42(4): 549-557, 1999

The effect of Zn, Cu and Mn on senescence in excised cotyledons of Eruca sativa L. Fresenius Environmental Bulletin 13(8): 733-739, 2004

Some physiological aspects of retardation of leaf senescence by 6-benzylaminopurine or disbudding in intact plants. Agrochimica 19(6): 507-521, 1975

Accumulation of metabolites and retardation of leaf senescence by 6-benzylaminopurine or disbudding treatment in intact bean plants. Bodenkultur 26(4): 355-368, 1975

Comparison of the effects of different sa concentrations on senescence in excised rocket (Eruca sativa L.) cotyledons. Pakistan Journal of Botany 38(2): 267-274, 2006