Also, the lack of responses to defoliation at the time of budbreak of two other wintergreen and one evergreen species was similar to those in the present study (Jonasson 1989), Hence, data from several species suggest that the supply of nutrients from senescing
leaves to new shoots in, at least, wintergreens, and probably also in some evergreens (Jonasson 1989), can be substituted by nutrient uptake without imposing any pronounced extra cost in terms of shoot growth.
The large negative value of GCA effects indicated the stay green character, whereas large positive GCA effects indicated the early senescing
nature of the plant material.
woody) stems and rhizomes, which very often also have low turnover rates (Aerts and Berendse 1989, Shaver and Chapin 1991, Aerts and Van der Peijl 1993); and (3) an efficient nutrient resorption from senescing
tissues (Boerner 1984, Lajtha and Schlesinger 1986, Jonasson 1989).
2; these data include measurements taken from tissue samples from mature, fully expanded leaves, but also young tissue from the basal regions of expanding leaves, and necrotic tissue from senescing
Rosenow (1977) suggested that the use of plant senescing
ratings is a promising selection technique in sorghum for resistance to charcoal rot [Macrophomina phaseolina (Tassi) Goid.
Presumably this trend reflects the proliferation of roots of the mainly annual pasture species as the growing season progressed, as well as senescing
plant material accumulating at the soil surface.
Crop Phenology, Number of Senescing
Leaves and Changes in Stem and Grain Dry Weight
These unprotected, standing fields serve as reservoirs for development of flies that, upon completion of the life cycle, will infest neighboring sweet corn fields, especially if they are in the early reproductive stages that are more attractive for oviposition than senescing
fields (Seal & Jansson 1993).
Schaap, "Polyphosphate accumulation in the senescing
mushroom Agaricus bisporus," Postharvest Biology and Technology, vol.
Caption: Small whorled pogonia in flower; flowers typically only persist of few days senescing
The number of green leaves per tiller (GLT) was considered as the number of leaves that were not senescing
, including grazed leaves.
Due to their increasing informational burden, senescing
systems are increasingly sluggish, with a progressively decreasing mass-specific rate of energy flow.