Chlorophyllase Is a Rate-Limiting Enzyme in Chlorophyll Catabolism and Is...

Plant Cell;  March 1, 2007 ;     700+ words ......citrus Chlase resulted in limited chlorophyll breakdown in protoplasts and no visible leaf...mature protein, led to extensive chlorophyll breakdown in both tobacco protoplasts and...chlorophyllide, a photodynamic chlorophyll breakdown product. Full-length and mature...

In Vivo Participation of Red Chlorophyll Catabolite Reductase in...

Plant Cell;  January 1, 2007 ;     700+ words ......central reaction of chlorophyll breakdown, porphyrin ring opening...participation of RCCR in chlorophyll breakdown. After complementation...senescing cells. The chlorophyll breakdown pathway has well been...

Arabidopsis ACCELERATED CELL DEATH2 Modulates Programmed Cell Death[W]

Plant Cell;  February 1, 2006 ;     700+ words ......and ACD2 may control products of chlorophyll breakdown that induce PCD (Mach et al., 2001...thought to be an intermediate in the chlorophyll breakdown pathway (Matile et al., 1999...findings raised the possibility that chlorophyll breakdown products modulate cell death during...

The Arabidopsis vitamin E pathway gene5-1 Mutant Reveals a Critical Role...

Plant Cell;  January 1, 2006 ;     700+ words ......chlorophyllase (Figure 1). While the subsequent fate of the chlorophyll breakdown product chlorophyllide a and its derived pigments has...Matile et al., 1999; Krutler, 2002). Phytol derived from chlorophyll breakdown is reesterified to acetic acid or other fatty acids...

Amino Acid Substitutions in Homologs of the STAY-GREEN Protein Are...

Plant Physiology;  May 1, 2008 ;     700+ words ......catabolites that are stored within the vacuole. The basic chlorophyll breakdown pathway is composed of the following steps: chlorophyll...and is thought to be the rate-limiting step within the chlorophyll breakdown pathway (Jacob-Wilk et al., 1999; Tsuchiya et al., 1999...

Why leaves turn red in Autumn. The role of anthocyanins in senescing...

Plant Physiology;  October 1, 2001 ;     700+ words ......1997). Unlike yellow and orange autumn leaves where chlorophyll breakdown unmasks the already present carotenoid pigments, most...Anthocyanin synthesis in autumn leaves often precedes chlorophyll breakdown and the color intensity of red-senescing leaves is increased...

Chlorophyll Breakdown in Senescent Arabidopsis Leaves. Characterization of...

Plant Physiology;  September 1, 2005 ;     700+ words ...During senescence, chlorophyll (chl) is metabolized to colorless nonfluorescent chl catabolites (NCCs). A central reaction of the breakdown pathway is the ring cleavage of pheophorbide (pheide) a to a primary fluorescent chl catabolite. Two enzymes catalyze this reaction, pheide a oxygenase (PAO)

DENNIS MCCANN; The hints and tints of autumn are in the air

The Milwaukee Journal Sentinel;  September 20, 2006 ;     700+ words ......attempt to say how this all comes about, felling perfectly good trees to share learned theories of photosynthesis and chlorophyll breakdown, whatever that means, or to tell of how unusually dry (or maybe wet) summers can make for especially vibrant (or possibly...

RIPENING BANANAS APPEAR BRIGHT BLUE UNDER BLACK LIGHT

The Hindustan Times;  October 21, 2008 ;     387 words ......structure of the main breakdown products, and identified a propionate ester group, a modification never seen before in a chlorophyll breakdown product. They say that this group has a stabilizing effect, and can help understand the unusually long duration of the...

MAPLE LEAVES FINALLY SHOW THEIR COLORS.(TRIAD/STATE)

The News & Record (Piedmont Triad, NC);  October 30, 1997 ;     582 words ......this season. Here's why, according to one expert: First it turned cool in early autumn, and trees began to show signs of chlorophyll breakdown - the process that turns green leaves red, yellow and gold. But then it turned hot, and trees became confused. They thought...

DESPITE DROUGHT, NORTH CAROLINA STATE UNIVERSITY EXPERT ANTICIPATES...

US Fed News Service, Including US State News;  October 13, 2008 ;     476 words ......create additional pigments that vary from yellow to red to blue. Some of the trees across the state have already begun the chlorophyll breakdown process. Even some dogwood trees in Raleigh have started to change colors, Bardon says. Leaves at higher elevations in...

Leaf Pigment and Canopy Photosynthetic Response to Early Flower Removal in...

Crop Science;  September 1, 2001 ;     700+ words ......levels of prematurely reddened cotton leaves. The red color has been identified as anthocyanin (Ant), which is unmasked by chlorophyll breakdown (Combrink, 1988). Disappearance of chlorophyll from leaves is one of the most prominent indications of senescence and...

New grass stays green; RESEARCH: Unit takes 30 years to develop unique...

Western Mail (Cardiff, Wales);  April 2, 2002 ;     378 words ......chlorophyll, and gradually changes colour as a result. However, AberNile lacks a key part of the chemical mechanism needed for chlorophyll breakdown, and so keeps its green hue. It was also found that a similar biological alternation is responsible for the difference...

Characterization of green seed, an enhancer of abi3-1 in Arabidopsis that...

Plant Physiology;  June 1, 2003 ;     700+ words ......maturation is indicated by the reduced expression of many seed maturation-specific mRNAs (Parcy et al., 1994) and a reduced chlorophyll breakdown at the end of seed maturation in abi3 null alleles (Nambara et al., 1995; Parcy et al., 1997). This results in the typical...

Specific Roles of [alpha]- and [gamma]-Tocopherol in Abiotic Stress...

Plant Physiology;  April 1, 2007 ;     700+ words ......tocopherol biosynthesis is derived from free phytol in seeds, substantiating the assumption that phytol gets recycled during chlorophyll breakdown (Peisker et al., 1989; Rise et al., 1989; Drmann, 2007). In plants, tocopherol composition differs between different...