Table of Contents
What is glume in wheat?
In botany, a glume is a bract (leaf-like structure) below a spikelet in the inflorescence (flower cluster) of grasses (Poaceae) or the flowers of sedges (Cyperaceae).
What is a lemma in grasses?
Lemma is a phytomorphological term referring to a part of the spikelet. It is the lowermost of two chaff-like bracts enclosing the grass floret. It often bears a long bristle called an awn, and may be similar in form to the glumes—chaffy bracts at the base of each spikelet.
Which is smaller the palea or the lemma?
Generally the lemma is larger than the palea, which is hidden between the lemma and the spikelet axis. The lemma and palea surround and protect the flower, and all three of these structures form the floret.
What is meant by lemma in mathematics?
In mathematics, informal logic and argument mapping, a lemma (plural lemmas or lemmata) is a generally minor, proven proposition which is used as a stepping stone to a larger result. For that reason, it is also known as a “helping theorem” or an “auxiliary theorem”.
What is glume blotch?
Stagonospora glume blotch (SGB), also called Stagonosopora nodorum blotch or glume blotch, is a common disease in Indiana wheat fields (Figure 1). SGB can devastate yields by causing kernels to shrink and shrivel, thereby reducing test weight.
What is empty glume?
Similar to rudimentary glumes, empty glumes have been considered as metamorphic bract leaves (Chase, 1968; Bell, 1991; Takeoka et al., 1993). The alternative hypothesis is that empty glumes are remnants of two lower reduced florets that lost all their inner floral organs.
What is plant palea?
In place of sepals, grasses have evolved the lemma and the palea, two bract-like structures that partially or fully enclose the inner reproductive organs. With little morphological similarities to sepals, whether the lemma and palea are part of the perianth or non-floral organs has been a longstanding debate.
What is Rice lemma?
In rice, a feature of the palea is the bending of its lateral region into a hook-shaped marginal structure. This allows the palea to lock into the facing lemma region, forming a close-fitting lemma–palea enclosure.
What is theorem and lemma?
Theorem : A statement that has been proven to be true. • Proposition : A less important but nonetheless interesting true statement. • Lemma: A true statement used in proving other true statements (that is, a less important theorem that is helpful in the proof of other results).
What is wheat spikelet?
Wheat flowers are largely cleisto- gamous, and pollen is Context 2. flowers are composed of spikelets which are made up of bract-like organs, glumes, and florets ( Fig. 2A-C).
Is palea sterile?
Above the rudimentary glumes are found a pair of scales called sterile lemmas or empty glumes depending on how they are interpreted. The floret is the unit above the sterile lemmas that comprises the lemma, the palea and the enclosed inner floral organs.
What is a sterile lemma?
Sterile lemmas are produced between the fertile floret and the rudimentary glumes (4, 14, 26). The sterile lemma has not been genetically characterized and is often mistaken for a glume. The present study showed that the G1 gene is specifically involved in specification of the sterile lemma.
What is Rice spikelet?
Spikelets are the basic inflorescence units in rice and typically consist of a flower of interlocked lemma and palea forming a husk, two lodicules, six stamens, and one pistil.
What is anthesis in plants?
Definition of anthesis : the action or period of opening of a flower.