Mechanisms to compensate for low nutrient availability include the conservation of nutrients in nutrient-poor tissues, resorption of nutrients from senescing tissues, enhanced rates of nutrient uptake at low temperatures, increased biomass of roots relative to shoots, associations with mycorrhizal fungi, uptake of nutrients in organic forms, and uptake of nitrogen by rhizomes.    From Wordnik.com.  [General characteristics of arctic species and their adaptations in the context of changes in climate and ultraviolet-B radiation levels] Reference

Most varieties of wheat have septoria lesions on the old senescing leaves, and fresh net blotch lesions are evident on winter barley varieties.    From Wordnik.com.  [FWi - All News] Reference

Assistance to a senescing matriarch might reflect misdirected (non-adaptive) behaviors that accrue no long-term or indirect fitness benefits to those helping.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Alternatively, assistance to a senescing mother might be adaptive, providing indirect fitness benefits to existing and/or future offspring of all family members.    From Wordnik.com.  [PLoS ONE Alerts: New Articles] Reference

Most varieties of wheat have septoria lesions on the old senescing leaves, and fresh net blotch lesions are evident on winter barley varieties Cassata and Pearl.    From Wordnik.com.  [FWi - All News] Reference

Similarly, retinal pigment epithelium cells derived from iPSC began senescing in the first passage, indicating the observed phenomenon is not limited to blood and vascular lineages.    From Wordnik.com.  [The Earth Times Online Newspaper] Reference

Similarly, RPE cells derived from iPS cells began senescing in the first passage, indicating the observed phenomenon is not limited to hemangioblastic lineages. ".    From Wordnik.com.  [FinanzNachrichten.de: Aktuelle Nachrichten] Reference

CRH levels lower in slower-senescing individuals 35.0 30.0 R² = 0.903 Relative Expression P = 0.0036 25.0 20.0 15.0 10.0 5.0 0.0 3 4 5 6 7 8 9 In-stream Life (Days).    From Wordnik.com.  [Recently Uploaded Slideshows] Reference