https://padlet.com/lim_sj/sucrose Made with a warm hug en-us 2018-04-24 04:02:54 UTC 2025-10-27 15:10:21 UTC hello@padlet.com tanszejean07 https://padlet.com/lim_sj/sucrose/wish/255513767 Hydrogen ions are being pumped into the cell wall of the companion cell by a proton pump. Sucrose is then loaded into the companion cell by facilitated diffusion through a co-transporter from the mesophyll cell. Sucrose diffuses into the phloem seive tube through the plasmodesmata. Water potential in the phloem sieve tube decreases 
Sze Jean]]> 2018-04-26 05:35:15 UTC https://padlet.com/lim_sj/sucrose/wish/255513767 https://padlet.com/lim_sj/sucrose/wish/255513774 Hydrogen ions are pumped into companion cell wall against concentration gradient. Hydrogen ions then enters companion cell down concentration gradient, sucrose is co-transported into companion cell against concentration gradient. Sucrose flows into phloem vessel through plasmodesmata

Sii Hui]]> 2018-04-26 05:35:18 UTC https://padlet.com/lim_sj/sucrose/wish/255513774 suleman14b https://padlet.com/lim_sj/sucrose/wish/255513779 1. Hydrogen ions pumped out from companion cells into their cell walls using active transport via proton pump, against concentration gradient.
2. Hydrogen ions re-enter companion cell (down concentration gradient - by facilitated diffusion) with sucrose (against concentration gradient - by secondary active transport) using H⁺ion sucrose co-transporter.
3. Sucrose enters sieve tubes from companion cells via plasmodemata using simple diffusion.

]]> 2018-04-26 05:35:20 UTC https://padlet.com/lim_sj/sucrose/wish/255513779 vvimeshika https://padlet.com/lim_sj/sucrose/wish/255513785 The assimilates loaf into phloem from the leaves and is transported to the companion cells. Hydrogen ions will be pumped out of the companion cells into its cell wall by active transport against the concentration gradient via carrier proteins which needs or involves hydrolysis of the ATP molecules for energy. When sucrose molecules arrive it enters into the companion cells along with Hydrogen ions by secondary active transport. The sucrose solution then enters into sieve elements by simple diffusion down the concentration gradient via channel proteins and plasmodesmata.]]> 2018-04-26 05:35:25 UTC https://padlet.com/lim_sj/sucrose/wish/255513785 zhichengq7 https://padlet.com/lim_sj/sucrose/wish/255513791 Hydrogen ion is pump out from companion cell into cell wall by active transport . Hydrogen ion gradient is formed . H ion is pump back into companion cell down concentration gradient . Sucrose is diffuse into companion cell from mesophyll through co transporter . Sucrose is then diffuse to phloem through plasmodesmata. -cheng]]> 2018-04-26 05:35:32 UTC https://padlet.com/lim_sj/sucrose/wish/255513791 bryanctc911 https://padlet.com/lim_sj/sucrose/wish/255513800 Sucrose is loaded into the phloem by companion cells. The proton pump driven by ATP pumps hydrogen ions to the cell walls of the companion cell, causing it to have a high concentration of H+ ions at the cell wall. The H+/sucrose Co transporter then transport the hydrogen back into the companion cell down concentration gradient along with sucrose from the source. ]]> 2018-04-26 05:35:37 UTC https://padlet.com/lim_sj/sucrose/wish/255513800 kamenrider1500 https://padlet.com/lim_sj/sucrose/wish/255513818 Phloem's companion pump many H+
Many H+ in source
Need energi ATP
H+ go back home with girlfriend (sucrose)
Pass through security (co transporter)
Sucrose diffuse into sieve
Love the doge

]]> 2018-04-26 05:35:46 UTC https://padlet.com/lim_sj/sucrose/wish/255513818 shuntian_lee https://padlet.com/lim_sj/sucrose/wish/255513833 1. H+ ions in the companion cell are pumped into the cell wall using energy from hydrolysis of ATP.
2. A H+ concentration gradient is set up as H+ concentration in the cell wall increases. The H+ ions diffuse back into the cell through co-transporter protein by facilitated diffusion.
3. Sucrose is transported into the companion cell by secondary active transport together with H+ through co-transporter.
4. Sucrose diffuses into the sieve element through plasmodesmata by simple diffusion

-Anonymous


]]> 2018-04-26 05:35:53 UTC https://padlet.com/lim_sj/sucrose/wish/255513833 Kim192001 https://padlet.com/lim_sj/sucrose/wish/255513928 1. H+ ions pumped out into cell wall of companion cell via a carrier protein (Proton Pump) by active transport, using energy from hydrolysis of ATP , against concentration gradient.

2. H+ ions move back into companion cells via a co-transporter, down concentration gradient by facilitated diffusion. Sucrose will be carried along against concentration gradient, via co-transporter by secondary active transport.

3. Sucrose then moves from companion cells into phloem sieve tubes via plasmodesmata by simple diffusion.

-Kimaya.

]]> 2018-04-26 05:36:50 UTC https://padlet.com/lim_sj/sucrose/wish/255513928 marciolio55 https://padlet.com/lim_sj/sucrose/wish/255513933 Sucrose is located in high concentration in the mesophyll cell. The companion cell uses atp to pump hydrogen ions through a hydrogen pump into the mesophyll cell through active transport. The hydrogen acts as a co transporter and allows sucrose to diffuse into the companion cell through secondary actuve transport against the concentration gradiant. From here the sucrose diffuses into the sieve tube cell down the concentration gradient.]]> 2018-04-26 05:36:53 UTC https://padlet.com/lim_sj/sucrose/wish/255513933 azhengjiet https://padlet.com/lim_sj/sucrose/wish/255513953 Sucrose is loaded into companion cell/sieve tube element through active transport. H+ was pumped out of the companion cell into cell wall. Excessive H+ move back into Cell through co-transporter molecule via active transport. Sucrose then move from companion cell into sieve tube, through plasmodesmata. :) ANG ANG

]]> 2018-04-26 05:36:59 UTC https://padlet.com/lim_sj/sucrose/wish/255513953 lesparkk https://padlet.com/lim_sj/sucrose/wish/255513967 Sucrose is loaded into be companion cell by active transport, the hydrogen ions in companion cells are pumped out into mesophyll cell by proton pump. The sucrose and hydrogen ion cotransporter moves hydrogen ions back into companion cell down its gradient, and sucrose is transported into the companion cell against the concentration gradient. The sucrose diffuses into sieve tube down the concentration gradient and through the plasmodesmata.]]> 2018-04-26 05:37:14 UTC https://padlet.com/lim_sj/sucrose/wish/255513967 https://padlet.com/lim_sj/sucrose/wish/255514141 The loading of sucrose into the phloem sieve tubes is an active transport process that requires ATP expenditure. Hydrogen ions (H⁺) are actively transported out of phloem cells by proton pumps (involves the hydrolysis of ATP). The concentration of hydrogen ions consequently builds up outside of the cell, creating a proton gradient. Hydrogen ions passively diffuse back into the phloem cell via a co-transport protein, which requires sucrose movement. This results in a build up of sucrose within the phloem sieve tube for subsequent transport from the source.

]]> 2018-04-26 05:39:08 UTC https://padlet.com/lim_sj/sucrose/wish/255514141 kseniakiseleva16 https://padlet.com/lim_sj/sucrose/wish/255514295

Active Transport : Hydrogen ions pumed into cell wall of companion cell against concentration gradient. 

Facilitated diffusion : Hydrogen ions and sucrose use a co-transporter to enter the companion cells. (Hydrogen down concentrate gradient and sucrose against concentration gradient) 

]]> 2018-04-26 05:40:39 UTC https://padlet.com/lim_sj/sucrose/wish/255514295 pearlymchai23 https://padlet.com/lim_sj/sucrose/wish/255514400 The loading of sucrose into the phloem sieve tubes is an active transport process that requires ATP expenditure. Hydrogen ions (H+) are actively transported out of phloem cells by proton pumps (involves the hydrolysis of ATP). The concentration of hydrogen ions consequently builds up outside of the cell, creating a proton gradient. Hydrogen ions passively diffuse back into the phloem cell via a co-transport protein, which requires sucrose movement. This results in a build up of sucrose within the phloem sieve tube for subsequent transport from the source.

]]> 2018-04-26 05:41:26 UTC https://padlet.com/lim_sj/sucrose/wish/255514400