Handbook of Plant and Crop Physiology

[50], and failure to cross biological membranes. It is proposed that ionized groups or low lipophilicity pre- vents entry into t ...

is not affected by PCMBS [12,64,65]. This is true despite the obvious sensitivity to inhibition by PCMBS of the uptake of exogen ...

volume.) A hypothetical model reconciles both the odd ultrastructural features (i.e., the ubiquitous pres- ence of the symplasti ...

riod [78,79]. In addition, the source must be able to accumulate enough reserve carbon to allow for envi- ronmental conditions ( ...

Like minor vein phloem loading, sieve tube unloading into sinks can occur by either symplastic or apoplastic routes (Figure 7B). ...

strates reduce the hydrostatic pressure in the phloem and allow continued phloem transport by bulk flow. In addition, in expandi ...

S Delrot. In: DA Baker, JA Milburn, eds. Transport of Photoassimilates. Harlow, Essex: Loughman Scientific and Technical, 1989, ...

R Turgeon. In: JL Bonnemain, S Delrot, WJ Lucas, J Dainty, eds. Phloem Transport and Assimilate Compart- mentation. Nantes, Fra ...

...

22 Carbohydrate Synthesis and Crop Metabolism Wattana Pattanagul, Edmund R. Miranda, and Monica A. Madore University of Californ ...

II. CARBOHYDRATE FORMATION IN SOURCE LEAVES Triose phosphates, the first products of the photosynthetic process, represent key m ...

conditions are right (i.e., if enough carbon exists in the PCR cycle to allow sufficient regeneration of ribu- lose-1,5-bisphosp ...

the PCR cycle. As indicated in Figure 3, the synthesis of sucrose results in the formation of Piin the cy- tosol. [Although not ...

The kinase enzyme, which forms the inhibitor, is activated by Fru-6-P and Pi, the two products of the FBPase reaction. The same ...

Species differences in SPS regulation are now being reported. Interestingly, the type of SPS regula- tion seen in a given plant ...

tosyl donor to create the fructosylsucrose isokestose by the reaction catalyzed by the enzyme sucrose:su- crosylfructose transfe ...

uole of photosynthetic cells may serve to buffer chloroplast from the adverse changes in cytosolic metabo- lites that occur when ...

some other physiological significance, for example, as a free radical scavenger imparting protection against hydroxyl radicals g ...

oligosaccharides is that the transfer of galactose residues to sucrose probably does not occur in the pho- tosynthetic cell wher ...

occur within the photosynthetic cell, probably through the conversion of UDP glucose to uridine diphos- phogalactose (UDPGal), t ...