The influence of mechanical defoliation and ethephon treatment on the dynamics of nitrogen compounds in chicory (Cichorium intybus L.)

Neefs, V; Maréchal, I; Velázquez-Martínez, Mauricio; Proft, M.P. De

doi:10.1016/s0304-4238(01)00306-5

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Although partial mechanical defoliation affected growth of chicory plants and their root mass was up to 20 % lower and the total fresh weight 50 % (Neefs et al 2002), in sugar cane, agronomic parameters were not affected. It might be that 10-month-old sugar cane plants had reached the final growth phase, so defoliation did not affect agronomic parameters negatively (Glasziou and Gayler 1972).…”

Section: Discussionmentioning

confidence: 92%

“…Although partial mechanical defoliation affected growth of chicory plants and their root mass was up to 20 % lower and the total fresh weight 50 % (Neefs et al. 2002), in sugar cane, agronomic parameters were not affected.…”

Section: Discussionmentioning

confidence: 99%

“…Pammenter and Allison (2002) found that sucrose yield per plant was slightly, although not significantly, greater in half‐defoliated sugar cane plants than in intact ones. Partial defoliation has resulted in increases in sucrose contents in Cherry trees ( Prunus cereasus ) (Layne and Flore 1995), but Neefs et al. (2002) reported that mechanical partial defoliation of witloof chicory ( Cichorium intybus ) affected plant growth.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Partial Defoliation on Sucrose Accumulation, Enzyme Activity and Agronomic Parameters in Sugar cane (Saccharum spp.)

Gutiérrez-Miceli¹,

Morales-Torres²,

Espinosa-Castaneda³

et al. 2004

J Agronomy Crop Science

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Mechanical defoliation of sugar cane plants (Saccharum spp.) will provide leaves that can be used as fodder. The effect of partial mechanical defoliation on sucrose content, enzyme activities and agronomic parameters of sugar cane is still unknown. We investigated how sucrose accumulation, activities of sucrose phosphate synthase, soluble acid invertase, sucrose synthase, neutral invertase, brix grades, purity grade, moisture content, fibre content, maturity index and reduced sugars of two commercial sugar cane plants (Mex 69‐290 and Mex 57‐473) were affected in a field experiment. The concentration of sucrose in stems of partial defoliated plants was not significantly different from that found in intact plants. Agronomic parameters and enzyme activities were not different in defoliated plants compared with intact plants except for the moisture content which was higher in defoliated plants than in intact ones. These results indicated that sugar cane plants could be partially defoliated without changing sucrose production and agronomic parameters while providing leaves that could be used as fodder.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Partial Defoliation on Sucrose Accumulation, Enzyme Activity and Agronomic Parameters in Sugar cane (Saccharum spp.)

Gutiérrez-Miceli¹,

Morales-Torres²,

Espinosa-Castaneda³

et al. 2004

J Agronomy Crop Science

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The use of Vis/NIR spectroscopy to predict the optimal root harvesting date of chicory (Cichorium intybus L.)

Francois

Brijs

et al. 2009

Postharvest Biology and Technology

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Die and let live: leaf senescence contributes to plant survival under drought stress

Munné‐Bosch¹,

Alegre²

2004

Functional Plant Biol.

610

318

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Leaf senescence is a highly regulated physiological process that leads to leaf death and is, as such, the last developmental stage of the leaf. Plant aging and environmental stresses may induce the process of senescence. Here we will focus on the role of leaf senescence in field-grown plants as a response to adverse climatic conditions and, more specifically, on how it contributes to plant survival under drought stress. Drought induces several responses in plants including leaf senescence, which plays a major role in the survival of several species. Drought-induced leaf senescence contributes to nutrient remobilisation during stress, thus allowing the rest of the plant (i.e. the youngest leaves, fruits or flowers) to benefit from the nutrients accumulated during the life span of the leaf. In addition, drought-induced leaf senescence, especially when accompanied by leaf abscission, avoids large losses through transpiration, thus contributing to the maintenance of a favourable water balance of the whole plant. Drought-induced leaf senescence occurs gradually and is characterised by specific macroscopic, cellular, biochemical and molecular changes. Leaf yellowing (i.e. chlorophyll degradation) and specific changes in cell ultrastructure (e.g. chromatin condensation, thylakoid swelling, plastoglobuli accumulation), metabolism (e.g.�protein degradation, lipid peroxidation) and gene expression occur during leaf senescence in drought-stressed plants. Cytokinins and ABA have been shown to be involved in the regulation of drought-induced leaf senescence, although the possible role of other plant hormones should not be excluded. Reactive oxygen species, whose concentrations increase during drought-induced leaf senescence, are also known to be regulators of this process. The complex mechanisms of regulation of leaf senescence in drought-stressed plants are discussed, and attention is drawn to those aspects that still require investigation.

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The influence of mechanical defoliation and ethephon treatment on the dynamics of nitrogen compounds in chicory (Cichorium intybus L.)

Cited by 4 publications

References 13 publications

Effects of Partial Defoliation on Sucrose Accumulation, Enzyme Activity and Agronomic Parameters in Sugar cane (Saccharum spp.)

Effects of Partial Defoliation on Sucrose Accumulation, Enzyme Activity and Agronomic Parameters in Sugar cane (Saccharum spp.)

The use of Vis/NIR spectroscopy to predict the optimal root harvesting date of chicory (Cichorium intybus L.)

Die and let live: leaf senescence contributes to plant survival under drought stress

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