GINO · Gibberellins in tomato ovule development
6РП — Действия „Мария Кюри“
- Период
- 2003-12-16 → 2004-12-15
- Финансиране от ЕС
- 40 000 €
- Участници
- 1
- Схема
- ERG
Линиите свързват координатора с партньорите.
Накратко на български
Растежът на плодовете при доматите се контролира от баланса между хормоните гиберелини, ауксини и абсцисова киселина. Разбирането на този механизъм помага да се разбере как хормоните регулират развитието на растенията и как се създават беЗсеменни плодове.
Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.
Резултати накратко
Final Activity Report Summary - GINO (Gibberellins in Tomato Ovule Development)
After pollination and fertilisation tomato ovary develops into a fruit, via a process which is mediated by the plant hormone gibberellin (GA). Application of GA to the outside of the ovary induces fruit growth even when pollination and fertilisation do not take place. The role of plant hormones in the mechanism that regulates fruit set is not well understood. We discovered that the activity of many genes involved in abscisic acid (ABA), auxin and plant hormones signalling were directly modulated after fertilisation or GA treatment in ovaries, which was the tissue that formed the fruit after fertilisation. The results suggested that fertilisation did not only stimulate fruit set via GA biosynthesis. GA probably acted together with auxin and ABA. ABA regulated dormancy in seeds and axillary buds. We hypothesised that fruit set was regulated by a balance of hormones; on the one hand GA and auxin that stimulated growth, and on the other hand ABA that induced dormancy and prevented fruit growth prior to fertilisation. These results were also important for the understanding of the regulation of developmental processes by hormones in general. The mechanism and importance of the hormone balance in fruit set was further investigated by the time of the project completion through modulation of the activity of some of the identified genes by generating transgenic tomato plants. Preliminary results suggested that these genes played important roles during fruit set as some transgenic tomato lines produced seedless fruits.
Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз
Цел на проекта
Bioactive gibberellins (GAs) are plant hormones that regulate important processes in the life cycle of higher plants. GA deficiency leads to male sterility as a result of abnormal anther development. GAs produced in the embryo and/or endosperm are required for normal seed growth and survival. In tomato (Solarium Lycopersicon L.), synthesis of bioactive GAs takes place in the ovary until it develops completely, and it is induced again as a consequence of pollination. Treatment of wild type tomato flowers w ith gibberellic acid can induce parthenocarpic fruit growth and inhibition of GA biosynthesis prevents fruit growth. Although GAs are indispensable in ovule and fruit development, it is not known which processes are directly regulated by GA. In addition, several other phytohormones are known to be involved in ovule development but it is not clear whether these act together with gibberellins or act independently. Fertility, seed set and fruit development are important traits for crops. We want to understand better the role of GAs, their way of action, and interaction with other hormones in tomato ovule/seed and fruit development. Tomato is an important crop widely used in plant science that can be used as a model for other members of the Solanaceae family, s uch as aubergine and sweet pepper. We want to approach the project objectives with cDNA AFLP to display GA responsive gene activity during ovule development and early fruit growth. In addition, from this genome wide transcript profile also an inventory can be made of developmentally regulated genes in the ovule. The function of most interesting genes will be analyzed in mutant tomato plants or in mutants from other species. The Marie Curie Return and Reintergration Grant can make possible the establishment of a thorough inventory of tomato genes involved in ovule and early fruit development and GA responsive genes. This transcript profile can be the basis of extensive rese#
Оригинален текст от CORDIS (на английски).
Участници
- STICHTING KATHOLIEKE UNIVERSITEIT · NIJMEGENКоординаторНидерландия
Връзки
Данни: CORDIS, © Европейски съюз