2007
DOI: 10.1371/journal.pone.0000154
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A Group-1 Grass Pollen Allergen Influences the Outcome of Pollen Competition in Maize

Abstract: Worldwide, 400 million people suffer from hay fever and seasonal asthma. The major causative agents of these allergies are pollen specific proteins called the group-1 grass pollen allergens. Although details of their antigenicity have been studied for 40 years with an eye towards immunotherapy, their function in the plant has drawn scant attention. Zea m 1 constitutes a class of abundant grass pollen allergens coded for by several genes that loosen the walls of grass cells, including the maize stigma and style… Show more

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Cited by 45 publications
(48 citation statements)
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“…In tomato, competition experiments have been performed between wild-type pollen and pollen in which one of these pollen allergens has been mutated. It revealed that pollen with the mutated protein was outcompeted by the wild-type pollen because of slower pollen tube growth, indicating an important role of pollen allergens for the access of pollen to the ovule (Valdivia et al, 2007). Silique length is correlated with the number of seeds per silique (Figure 1).…”
Section: Homology Of Heat Stress Responses Between Speciesmentioning
confidence: 99%
“…In tomato, competition experiments have been performed between wild-type pollen and pollen in which one of these pollen allergens has been mutated. It revealed that pollen with the mutated protein was outcompeted by the wild-type pollen because of slower pollen tube growth, indicating an important role of pollen allergens for the access of pollen to the ovule (Valdivia et al, 2007). Silique length is correlated with the number of seeds per silique (Figure 1).…”
Section: Homology Of Heat Stress Responses Between Speciesmentioning
confidence: 99%
“…Phylogenetic analysis shows that EXPB1 is part of a distinctive group of b-expansins that evolved uniquely in the grass family (Poaceae; Sampedro et al, 2015) and serve a biological function that appears to be unique among expansins, which is to facilitate penetration of the pollen tube through the stigma and style, thereby quickening delivery of sperm to the ovule (Valdivia et al, 2007(Valdivia et al, , 2009). The crystal structure of EXPB1 was solved with native protein purified from maize pollen and shows two tightly packed domains forming an elongated ellipsoidal protein with a long, open, presumptive binding surface that spans the two domains (Yennawar et al, 2006).…”
mentioning
confidence: 99%
“…That also may be the reason for the phenomenon that putative pollen allergens showed both higher gene duplication rates and lower Ka/Ks values. Allergenic b-expansins are good examples influencing the outcome of pollen competition by affecting pollen tube growth (Valdivia et al, 2007).…”
Section: Discussionmentioning
confidence: 99%