Proteinase cotton

If immature cotton embryos have the ability to germinate, demonstrated by their behaviour when isolated, why do they not do so in the intact developing seed Vivipary, the germination of immature seeds within the fruit of the parent plant, is rare in cotton and when it occurs it is lethal. Prevention of vivipary might be explained by the fact that coincidental with the capacity of the embryo to germinate precociously, and perhaps to produce messenger RNA for proteinase... 

Table 3.5. Development of proteinase enzyme activity during precocious germination of cotton embryos...

Another enzyme which arises in germinated cotton seeds is isocitrate lyase, important in the conversion of the products of fat catabolism to hexose (see Chap. 6). This enzyme, like the proteinase, is absent from the maturing seed and is synthesized de novo following germination. One group of workers present evidence for its synthesis on conserved messages [84], but others make substantial claims that it is not [173]. 

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