Solving Botany Questions: Adding Sugar to Raspberries & Potato/Beet Tissue

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SUMMARY

This discussion addresses two key botany questions regarding the effects of sugar on raspberries and the hydrostatic pressure in potato and beet tissues. Adding sugar to raspberries increases juiciness due to osmotic movement of water from areas of lower solute concentration to higher solute concentration, creating juice in the bowl. The hydrostatic pressure values indicate that the potato tissue has positive turgor pressure (2.44 MPa), signifying well-hydrated cells, while the beet tissue exhibits negative turgor pressure (-0.0352 MPa), indicating flaccid cells due to poor hydration.

PREREQUISITES
  • Understanding of osmotic pressure and solute concentration
  • Knowledge of hydrostatic pressure and turgor pressure concepts
  • Familiarity with plant cell structure, including cell walls
  • Basic principles of water potential in plant biology
NEXT STEPS
  • Research osmotic pressure effects on fruit texture and flavor
  • Study the relationship between hydrostatic pressure and plant cell turgor
  • Explore methods for measuring turgor pressure in plant tissues
  • Learn about the role of solutes in plant water regulation
USEFUL FOR

Students in botany or plant biology, researchers studying plant physiology, and educators teaching concepts related to plant water relations.

disruptors
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Hey guys, I've been spending a 3 hrs trying to figure this one out...

1) Why does adding sugar to rasberries make them juicy? to rephrase I mean why would the entire raspberry/sugar concoction become more juicer as
a whole (why will there end up being juice in the bowl?)


It has to do with water movement, is it because since the salt is on the outside it moves from lower solute concentration to higher solute concentration on the outside? I just can't imagine it.

2) What does the calculated hydrostatic pressure value indicate about the turgor pressure of the intact potato and beet tissue?

This question is from my water potential lab assignment. My answer is:

The hydrostatic pressure of 2.44 Mpa for the potato (the value I got) indicates that the turgor pressure is positive and that the cells of the potato are well hydrated with a rigid cell wall. The negative hydrostatic pressure of -.0352 Mpa for the beet tissue indicates a negative turgor pressure and that the cells are not hydrated well with water, which causes flaccid cells.

I am not sure if what i put is answering the question?

Thanks a lot guys, I am stuck on these and been working at it for 4 hrs now, and its due tomm, just wanted to make sure I am on the right track. Thanks again!
 
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For (1), you're somewhat on the right track, but it's not salt that moves. Where did you change the solute concentration, and what else would have to change to reach equilibrium again?

For (2), did you really mean to say cell wall for the potato? Otherwise, I think you're doing okay on that one (though, I can't speak for your teacher if they like more explanation or not).