3. Functional analysis of individual targetsFrom the multitude of target genes identified, a small subset hasbeen selected for in-depth functional analysis. An early examplewas the AG target gene SHP2, which functions redundantly with itsclose homolog SHP1 in regulating the development of specific tissuesof the carpel that are subsequently required for releasing seedsfrom the fruits [26]. This began to reveal how specific aspects oforgan development are delegated from the organ identity genes tointermediate regulators. Another example is SPOROCYTELESS (SPL),which encodes a putative transcription factor required for bothmale and female microsporogenesis [27] and was identified as adirect target of AG and SEP3 [25,28].
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