how to Collect the seed at maturity

Table of Contents

Introduction :

Collect the seeds when they are mature. It is best to wait until the seeds are fully developed before collecting them. Immature seeds of many species will not germinate. Additionally, if they are placed on a spotted substrate, the lungi will soon cover them. However, a few days after anthesis, the seeds of some species may germinate .

It should be emphasized that if these immature seeds are allowed to dry out, they will .Immature seeds of the same species may have different germination requirements and percentages than mature seeds. Adult seeds of Avena fatua did not germinate (were dormant), in contrast to immature that did germinate.

Hsiao, 1985 Collect the seed

Hsiao, 1985 found a correlation between the onset of dormancy in this species and a decline in water content of the embryo). Other species may have seeds that germinate more quickly when young have shown that this seed coat impermeability develops when the seed dries, which is why mature seeds of some species do not germinate because the seed coats are impermeable to water.

Therefore, germination is possible if seeds of hard-seeded species are collected before they have had a chance to dry on the mother plant. The seeds of many species become colors other than green, and are no longer “milky” when pinched or split in half.

moisture content level Collect the seed

Most seeds can be dried to 2-5% , and sometimes even as low as 0.5% moisture content without loss of viability . The term “conservative seed” refers to them . As a result, in many species, a low moisture content is a reliable indicator that the seeds are ripe and should be collected for germination testing.

When orthodontic seeds on the parent plant stop increasing in dry weight (= reach raw maturity), a desiccation layer is generated, disrupting the water supply. The mature drying process occurs in the absence of water . Prickling is essential for germination in mime seeds.

seeds dried

seeds dried while attached to the mother plant had better germination rates than those dried after collection . Seeds of some species exhibit good viability when harvested at bulk maturity and dried to low moisture content . However, seeds of some species do not reach their potential for optimum lifespan, for example after the bulk maturity date. After aging at 5 (FC) at 5U’ relative humidity (RL) for about 1.. and 9 days, Digitalis purpurea seeds were harvested at 0..4..8.. and after 12 days of bulk maturity date collected. 509 or fewer seeds were viable.

In some species, the ripe seeds do not dry on the mother plant, and when dispersed, they have a moisture content close . Furthermore, if seed moisture levels drop below 30–65%, viability varies among different species, .When collecting resistant seeds, consider size, color and how easy it is to separate them from the parent plant, rather than degree of dryness.

general rule

As a general rule, seeds should be chilled when spontaneous dispersal begins. Some species do not begin dispersing their seeds until several months after maturity. when the dried seeds are still attached to the parent plant.

non-dispersable seeds

The non-dispersable seeds of these species should be collected at maturity and on a regular basis until dispersal occurs. Non-dispersed seeds may differ in the way they respond to germination, meaning that they may germinate only under slightly different environmental conditions than before.

example,

For example, the senescence seeds of the winter annual plant Sedum pachylum develop in early summer, although it does not disperse until fall. 5. Only a few seeds of Pulcaeum germinate at low temperature to maturity. Both the maximum temperature at which seeds can germinate and the percentage of germination at all temperatures decrease in summer. In contrast, salt more and dried seeds of eight species of Gcum canadcnsc are available. Baskin and Frava Indianiensis

that were left on the mother plant for several months after maturity showed a decrease in the germination temperature range. However, the germination or dormancy-breaking requirements of some species are unaffected by dry, non-dispersible seeds

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