Pod shattering trait request

[planteome-user]

Fruit senescing quality trait Legume pod shattering Def="Measurement of extent of pod shattering. This trait refers to shattering or pre-harvest rupture of the pod releasing the seeds."

I am not sure that the term grain shattering is applicable to legumes because the definition uses the word "caryopsis" and I am not sure that caryopsis is the ontological analog of pod. Also, pod shattering is the result of differential drying rates of the tissues of the pod producing torsional forces that eventually rip the valves of the pod apart. The other complication is that other non-leguminous plants also produce "pods" but they are probably not ontologically analogous to legume pods ie cacao pods. For all I know, cacao pods might prematurely "split" before harvest (not due to an abscission zone) and that could be commonly called "shattering". Thus we may need the qualifier "Legume".

Reported by: maxglycine

Original Ticket: obo/plant-trait-ontology-to-requests/81

[planteome-user]

Ther eis a similarity to fruit/seed shattering. Often considered a domestication trait. However, the complexity and usage is different here for example compared to rice/cherry/apple. In these cases the fruit falls off from the plant easily upon ripening or early during ripening leading to low yield. These are examples associated with abscission tissue formation. In the case mentioned by Rex, the fruit is not coming off the plant, but rupturing of the septa (possibly) in the legume fruit in the process called fruit dehiscence (http://amigo.geneontology.org/cgi-bin/amigo/term\_details?term=GO:0010047&session\_id=9150amigo1336583059) . Same may happen in sliliques of brassicaceae and capsules of poppy. In these cases if I am not wrong it's a premature dessication and dehiscence process that affects physiological changes in the cells and tissues lining the septum.

Original comment by: jaiswalp

[planteome-user]

Will make new children of fruit senescing quality trait > pod shattering trait > legume pod shattering

Google Docs spreadsheet of requested terms: https://docs.google.com/spreadsheet/ccc?key=0Ar1O1Y7eIKhsdE9MYUE1ZFFIdWZJb1ROTmszVHVucUE&pli=1\#gid=1

Original comment by: lauramooray

[planteome-user]

• milestone: --> Quality Trait
• priority: 5 --> 7
• assigned_to: nobody --> lauramooray

Original comment by: lauramooray

[planteome-user]

Yes, fruit dehiscence is the process. I guess you could say that the "differential rate" rate of drying is the cause of the separation of the carpel into two pieces. The separation occurs along the fused edge of the essentially folded carpel and also along the "back" of the carpel. This usually expells the dry seeds which detracts from its commercial value. According to Esau, the Brassicaceae have a slightly different version of fruit dehiscence, the capsule. In the Brassicaceae, the capsule is composed of more than one carpel and is called a silique. The silique has a few more innovations that separate it from other taxa that also produce a capsule of varying descriptions. But the bottom line is that it is that both are apparently different than "grain shattering" is that right? If so, I would say that the term that needs to be added to the TO then is "fruit dehiscence". The definition could be "A fruit maturation process where differential drying rates of carpel tissues cause the rupture of the carpel(s) surrounding the seeds liberating them into the environment". This sounds like it should also cover the Brassicaceae with their siliques and any other taxa that expel dry seeds from a gynoecium. What do you think?

Original comment by: maxglycine

[planteome-user]

• assigned_to: laura moore --> Laurel Cooper

Original comment by: lauramooray