PLANT MODULARITY AND SENESCENCE. “However, maintaining organism integrity with increased complexity in an evolutionary timescale has some costs. In a meta-analysis of plant life-history tables, data provided by Silvertown et al. support the idea that organisms which remain integrated in modules are more likely to senesce than organisms whose ramets separate into unconnected entities.”
http://onlinelibrary.wiley.com/doi/10.1111/j.1469-8137.2010.03360.x/full