linkedin post 2016-12-02 05:51:17

Uncategorized
BIOLOGICAL EMERGENCE. "The emergence of life, the genetic code, complex cells, multicellular organisms and language are some of the best-known examples. They all involve a novel class of organization with high-order properties not reducible to the properties of the lower-scale units." https://lnkd.in/d94S2CY View in LinkedIn
Read More

linkedin post 2016-12-03 06:36:59

Uncategorized
SINK-SOURCE CHATTER. "Senescence is responsive to communication between sources and sinks in which sugar signalling and hormonal regulation play central roles. Monocarpy and polycarpy represent contrasting outcomes of the balance between the determinacy of apical meristems and source–sink cross-talk. Even extremely long-lived perennials sustain a high degree of meristem integrity." https://lnkd.in/dPac2Jv View in LinkedIn
Read More

linkedin post 2016-12-03 06:33:43

Uncategorized
SINKS TRUMP SOURCES. "A semelparous plant dies because its sink tissues kill its source organs by a kind of starvation, by induction of senescence in response to nutrient diversion or by export of a ‘death hormone'." (Semelparous organisms have only one reproductive episode before death). https://lnkd.in/dPac2Jv View in LinkedIn
Read More

linkedin post 2016-12-01 07:07:41

Uncategorized
CODE BIRTH. "Stereochemical match is aided by codonic or anticodonic triplets in the corresponding binding sites although an open question is the accuracy when all amino acids and aptamers are present in the same milieu. Should this mechanism turn out to be robust, it offers a convenient road toward initial establishment of the code." http://www.pnas.org/content/112/33/10104.full View in LinkedIn
Read More

linkedin post 2016-12-03 06:29:09

Uncategorized
SOURCES. "Organs that supply the precursors for sink metabolism are sources. Sources and sinks communicate through the vascular system. During development of the endosperm of cereal grains and the parenchyma of potato tubers, large amounts of starch are accumulated. These organs are supplied via the phloem with assimilated C mostly fixed by current photosynthesis." https://lnkd.in/dPac2Jv View in LinkedIn
Read More

linkedin post 2016-12-03 06:25:37

Uncategorized
SINKS. "A sink is defined as a net importer of nutrients (nitrogen (N), phosphorus (P), potassium (K), sulfur (S) and other minerals) and assimilates carbon (C) derived directly or indirectly from photosynthesis. Developing seeds, bulbs, tubers and other structures that accumulate storage compounds are strong sinks, as are expanding leaves and branches during vigorous vegetative growth." https://lnkd.in/dPac2Jv View in LinkedIn
Read More

linkedin post 2016-12-03 06:21:10

Uncategorized
FOREST TURNOVER. "Molecules, cells, phytomers, individuals and even whole floras typically turn over. Turnover is defined as flux through a pool. In the case of leaf turnover, the pool is the canopy. Newly initiated leaves are recruited to the canopy, grow and mature, become senescent and ultimately die and leave the pool." https://lnkd.in/dPac2Jv View in LinkedIn
Read More

linkedin post 2016-12-03 06:16:54

Uncategorized
DECIDUOUS TREES. "Here much of the plant body is made up of dead tissues, the canopy is renewed and discarded every year, root systems turn over, and reproduction takes place repeatedly over decades, centuries or even millennia. In iteroparous species, such as trees and clonal plants, there is a disjunction between the lifespans of the whole and parts." https://lnkd.in/dPac2Jv View in LinkedIn
Read More