Leaf senescence is the last stage of leaf development and is accompanied by cell death. In contrast to senescence in individual organisms that leads to death, leaf senescence is associated with dynamic processes that include the translocation of nutrients from old leaves to newly developing or storage tissues within the same plant. The onset of leaf senescence is largely regulated by age and in...

Transformed Arabidopsis thaliana plants have been produced by a modified leaf disk transformation-regeneration method. Leaf pieces from sterilely grown plants were precultured for 2 days and inoculated with an Agrobacterium tumefaciens strain containing an avirulent Ti (tumor-inducing) plasmid with a chimeric gene encoding hygromycin resistance. After cocultivation for 2 days, the leaf pieces w...

Abstract Currently, Pestalotiopsis leaf fall disease caused by the fungus microspora is commonly found in Indonesian rubber plantations. The defoliation period usually occurs for 1 month as a response to drought during dry season. However, due this disease, gradually with an earlier fall. Leaf can cause decrease number of plant canopy which affects area index and latex production. Therefore, st...

hidden hunger (i.e., invisible symptoms of growth disorder caused by nutrient deficiency). It may be possible Leaf K concentrations needed for optimum soybean [Glycine max to alleviate the hidden hunger and prevent further de(L.) Merr.] production under conservation tillage systems may be different from those in conventional tillage (moldboard plow) because velopment into severe nutrient defici...