Added three new terms:
plant sap (new PO:00255380): A portion of plant substance (PO:0025161) that is an aqueous solution which may contain sugars, hormones, mineral elements and/or other nutrients.
Comment: plant sap should not be confused with latex or resins.
xylem sap (new PO:0025539): A plant sap (PO:0025538) that is an aqueous solution which may contain mineral elements, nutrients, and plant hormones, and is transported from the root system (PO:0025025) toward the leaves through the tracheary elements (PO:0000290) of the xylem.
Transport of sap in xylem is characterized by movement from the roots toward the leaves.
Phloem sap (new PO:0025539): A plant sap (new PO:0025538) that is an aqueous solution which may contain sugars, mineral elements, and plant hormones, and is transported through the phloem sieve elements (PO:0025406).
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Sap is not just nutrition. It carries RNA, proteins and I am sure microbes as well. Much of the content is also used to maintain turgor and the pressure flow in xylem and phloem as well.
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Based on the discussions at the POC Conf call 4-9-13, made the following changes:
Revised def'n:
plant sap (PO:0025538):
A portion of plant substance (PO:0025161) that is an aqueous solution that can be transported through the apoplast (GO:0048046) or symplast (GO:0055044).
New terms:
root system phloem sap (PO:0025567): A phloem sap (PO:0025540) that is located in the root system (PO:0025025).
shoot system phloem sap (PO:0025566): A phloem sap (PO:0025540) that is located in the shoot system (PO:0009006).
root system xylem sap (PO:0025568): A xylem sap (PO:0025539) that is located in the root system (PO:0025025).
shoot system xylem sap PO:0025565 : A xylem sap (PO:0025539) that is located in the shoot system (PO:0009006).
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Added three new terms:
plant sap (new PO:00255380): A portion of plant substance (PO:0025161) that is an aqueous solution which may contain sugars, hormones, mineral elements and/or other nutrients.
Comment: plant sap should not be confused with latex or resins.
xylem sap (new PO:0025539): A plant sap (PO:0025538) that is an aqueous solution which may contain mineral elements, nutrients, and plant hormones, and is transported from the root system (PO:0025025) toward the leaves through the tracheary elements (PO:0000290) of the xylem.
Transport of sap in xylem is characterized by movement from the roots toward the leaves.
Phloem sap (new PO:0025539): A plant sap (new PO:0025538) that is an aqueous solution which may contain sugars, mineral elements, and plant hormones, and is transported through the phloem sieve elements (PO:0025406).
Sap is not just nutrition. It carries RNA, proteins and I am sure microbes as well. Much of the content is also used to maintain turgor and the pressure flow in xylem and phloem as well.
please add 4 more terms to be more specific
-shoot xylem sap
-root xylem sap
-shoot phloem sap
-root phloem sap
the reason xylem/phloem sap contents from root and shoot may differ.
Based on the discussions at the POC Conf call 4-9-13, made the following changes:
Revised def'n:
plant sap (PO:0025538):
A portion of plant substance (PO:0025161) that is an aqueous solution that can be transported through the apoplast (GO:0048046) or symplast (GO:0055044).
New terms:
root system phloem sap (PO:0025567): A phloem sap (PO:0025540) that is located in the root system (PO:0025025).
shoot system phloem sap (PO:0025566): A phloem sap (PO:0025540) that is located in the shoot system (PO:0009006).
root system xylem sap (PO:0025568): A xylem sap (PO:0025539) that is located in the root system (PO:0025025).
shoot system xylem sap PO:0025565 : A xylem sap (PO:0025539) that is located in the shoot system (PO:0009006).