What conditions are required for the mass flow of sucrose in phloem sieve tubes to occur?
- Aphloem sieve tube in sources: higher hydrostatic pressure, higher water potential; phloem sieve tube in sinks: lower hydrostatic pressure, lower water potential
- Bphloem sieve tube in sources: higher hydrostatic pressure, lower water potential; phloem sieve tube in sinks: lower hydrostatic pressure, higher water potential
- Cphloem sieve tube in sources: lower hydrostatic pressure, higher water potential; phloem sieve tube in sinks: higher hydrostatic pressure, lower water potential
- Dphloem sieve tube in sources: lower hydrostatic pressure, lower water potential; phloem sieve tube in sinks: higher hydrostatic pressure, higher water potential