Handbook of Plant and Crop Physiology

and predicted the involvement of secondary regeneration cycles such as photorespiration [32,36,37]. Al- though the first functio ...

C Kühn, L Barker, L Bürkle, WB Frommer. J Exp Bot 50:935, 1999. WB Frommer, U Sonnewald. J Exp Bot 46:587, 1995. MH Zimmermann, ...

Y Shishido, H Challa, J Krupa. J Exp Bot 38:1044, 1987. M Dixon, J Grace. Plant Cell Environ 5:323, 1982. B Grodzinski, J Jiao, ...

20 Production-Related Assimilate Transport and Partitioning John E. Hendrix Colorado State University, Fort Collins, Colorado 42 ...

II. CROP PRODUCTIVITY A. Assimilate Partitioning General Considerations Total biomass production of a plant is dependent on th ...

Harvest Index The mechanism by which increase in economic productivity has been attained is by increasing total dry matter pro ...

Carbohydrate Metabolism Of course, a plant’s development and response to the environment are mediated by gene expression. Ther ...

assimilate partitioning and may even feed back on supply by affecting photosynthesis. From an evolu- tionary standpoint, these p ...

that plants treated with high temperatures were able to recover some lost enzyme activity after being returned to a cool environ ...

support the hypothesis that the period of flower development is the most critical portion of the life of crop plants if sexual p ...

high as 32°C for the unshaded plots. It seems likely that lowering soil temperature was more important than loss of light in a r ...

vated concentrations of CO 2 were used for specific time periods. Also, this appears to be in conflict with shading experiment r ...

III. WHAT IS TRANSLOCATED AND WHY A. Sugars and Sugar Alcohols Sugars and sugar alcohols carry 60 to 95% of the translocated car ...

favored sucrose. As with sugars, the concentrations and ratios of concentrations of various nitrogenous compounds in sieve tubes ...

phloem mobility of the nutrient being tested, whereas the initial appearance of symptoms in younger leaves indicates phloem immo ...

ing ions [191]. It should be noted that the cells of embryos have essentially no vacuole in which to se- quester ions. Other stu ...

ties of movement were too great to be accounted for by diffusion. Furthermore, when plants were double labeled with^14 C-sugar,^ ...

In discussing phloem loading, several characteristics of the system must be considered: (1) loading is selective, (2) concentrat ...

made to characterize proteins that may be involved in phloem loading of noncarbohydrate materials [258]. C. Symplastic Pathway T ...

pathway, and plants with intermediate anatomy probably use either or both pathways. Other studies sup- port this hypothesis of a ...