LEADER 03885nam 2200505z- 450 001 9910261139903321 005 20210211 035 $a(CKB)4100000002484693 035 $a(oapen)https://directory.doabooks.org/handle/20.500.12854/56347 035 $a(oapen)doab56347 035 $a(EXLCZ)994100000002484693 100 $a20202102d2017 |y 0 101 0 $aeng 135 $aurmn|---annan 181 $ctxt$2rdacontent 182 $cc$2rdamedia 183 $acr$2rdacarrier 200 00$aPlant Organ Abscission: From Models to Crops 210 $cFrontiers Media SA$d2017 215 $a1 online resource (271 p.) 225 1 $aFrontiers Research Topics 311 08$a9782889453283 311 08$a2889453286 330 $aPlant organ abscission is a developmental process regulated by the environment, stress, pathogens and the physiological status of the plant. In particular, seed and fruit abscission play an important role in seed dispersion and plant reproductive success and are common domestication traits with important agronomic consequences for many crop species. Indeed, in natural populations, shedding of the seed or fruit at the correct time is essential for reproductive success, while for crop species the premature or lack of abscission may be either beneficial or detrimental to crop productivity. The use of model plants, in particular Arabidopsis and tomato, have led to major advances in our understanding of the molecular and cellular mechanisms underlying organ abscission, and now many workers pursue the translation of these advances to crop species. Organ abscission involves specialized cell layers called the abscission zone (AZ), where abscission signals are perceived and cell separation takes place for the organ to be shed. A general model for plant organ abscission includes (1) the differentiation of the AZ, (2) the acquisition of AZ cells to become competent to respond to various abscission signals, (3) response to signals and the activation of the molecular and cellular processes that lead to cell separation in the AZ and (4) the post-abscission events related to protection of exposed cells after the organ has been shed. While this simple four-phase framework is helpful to describe the abscission process, the exact mechanisms of each stage, the differences between organ types and amongst diverse species, and in response to different abscission inducing signals are far from elucidated. For an organ to be shed, AZ cells must transduce a multitude of both endogenous and exogenous signals that lead to transcriptional and cellular and ultimately cell wall modifications necessary for adjacent cells to separate. How these key processes have been adapted during evolution to allow for organ abscission to take place in different locations and under different conditions is unknown. The aim of the current collection of articles is to present and be able to compare recent results on our understanding of organ abscission from model and crop species, and to provide a basis to understand both the evolution of abscission in plants and the translation of advances with model plants for applications in crop species. 517 $aPlant Organ Abscission 606 $aBotany & plant sciences$2bicssc 610 $aabscission zone 610 $aArabidopsis 610 $aauxin 610 $acell wall 610 $aethylene 610 $afruit abscission 610 $aOrgan abscission 610 $asignaling 610 $atomato 610 $atranscription 615 7$aBotany & plant sciences 700 $aTucker$b Mark Leo$4auth$01782458 702 $aTimothy J. Tranbarger$4auth 702 $aShimon Meir$4auth 702 $aRoberts$b J. A$g(Jeremy A.)$4auth 906 $aBOOK 912 $a9910261139903321 996 $aPlant Organ Abscission: From Models to Crops$94308665 997 $aUNINA