The albino lemma 1 (alm1) mutants of barley (Hordeum vulgare L.) exhibit obvious chlorophyll-deficient hulls. Hulls are seed-enclosing tissues on the spike, consisting of the lemma and palea.
Seed and root hair protective protein (SRPP) is crucial for maintaining cell wall integrity, and its absence leads to the production of severely defective seeds in srpp-1 mutant plants, particularly under low humidity conditions.*
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The germination rate of srpp-1 seeds is significantly reduced, with less than 6% of defective seeds able to germinate compared to an 83% germination rate for normal seeds, indicating a strong link between SRPP function and seed viability.*
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When SRPP is overexpressed, it not only aids in improving seed viability after stress (like high temperature) but also suggests that modifying the SRPP gene could potentially enhance seed quality and integrity.*